5528:
208:
DeWitt and Colton (1964) described the
Needmore as "soft calcareous medium dark-brownish-gray and greenish-gray shale and mudrock...and soft, slightly calcareous very fissile brownish-black shale" that is not resistant to weathering. They estimated its thickness in their study area (southern
330:
deWitt, W. Jr., and Colton, G. W., 1964, Bedrock geology of the Evitts Creek and
Pattersons Creek Quadrangles, Maryland, Pennsylvania, and West Virginia: U.S. Geological Surveys Bull. 1179, pl 1 and 2.
4228:
768:
5572:
5651:
3030:
361:
5646:
761:
5565:
5606:
318:
Willard, Bradford, and
Cleaves, A.B., 1939, Ordovician-Silurian relations in Pennsylvania: Geological Society of America Bulletin, v. 50, no. 7, p. 1165-1198.
5591:
4214:
1863:
Gantz, Hundred-foot sand, Fifty-foot sand, Thirty-foot sand, Nineveh-Snee, Gordon Stray, Fourth Sand, Fifth Sand, Bayard Sand, Elizabeth Sand, Sweet
Richard,
354:
1887:
Upper Warren, Lower Warren, Speechely Stray, Speechely, Balltown A, Balltown B, Balltown C, Sheffield, First
Bradford, Second Bradford, Third Bradford, Kane
754:
5616:
5611:
5558:
5601:
5596:
201:
The
Needmore Formation was originally described by Willard and Cleaves in 1939 as a dark- to medium-gray limy shale, based on exposures in southern
3016:
347:
5631:
4221:
5656:
3023:
5636:
5621:
1590:
1568:
942:
210:
1217:
1207:
952:
927:
1277:
1267:
1144:
1133:
273:
202:
1386:
1370:
1328:
1317:
5626:
2374:
2356:
2338:
1952:
1526:
1516:
269:
4438:
3091:
1433:
1340:
1292:
1282:
1212:
1076:
214:
4013:
1416:
1272:
1154:
1149:
1097:
932:
5538:
1558:
1495:
1391:
1081:
3582:
3544:
1459:
1287:
1025:
2958:
1375:
1165:
1066:
1035:
1010:
691:
5413:
4393:
4088:
3865:
3258:
3152:
3082:
1485:
1421:
1086:
1071:
1015:
977:
5195:
3965:
3805:
3777:
2745:
2196:
2145:
1427:
1411:
1262:
1159:
4975:
4879:
4051:
3940:
3920:
3201:
2904:
2763:
2425:
2016:
1980:
1717:
1580:
1400:
1222:
1128:
889:
879:
874:
696:
653:
265:
146:
4036:
3980:
3895:
3253:
3221:
3216:
3119:
2021:
1985:
1866:
1830:
1677:
1610:
1380:
1364:
1257:
1103:
1050:
844:
719:
476:
458:
5641:
5366:
5315:
5297:
5205:
5200:
4970:
4410:
4093:
4041:
3925:
3147:
3137:
2968:
2780:
2590:
2489:
2140:
1654:
1030:
1020:
435:
101:
5502:
5077:
3900:
3268:
2998:
2855:
2201:
1928:
1531:
1521:
1470:
1442:
1232:
1227:
1123:
869:
859:
854:
4133:
3995:
3990:
3955:
3890:
3617:
3248:
3238:
3104:
2850:
2755:
2750:
2725:
2720:
2715:
1975:
1687:
1621:
1599:
1585:
899:
5433:
5310:
5154:
4673:
4479:
4138:
4103:
4056:
4046:
4031:
3960:
3910:
3885:
3875:
3682:
3654:
3442:
3411:
3378:
3243:
3109:
2963:
2860:
2806:
2692:
2328:
2208:
2035:
1825:
1713:
1574:
1464:
1312:
1170:
1113:
1060:
1000:
947:
917:
907:
599:
453:
430:
3114:
1876:
1138:
1091:
937:
849:
5497:
5271:
5177:
5072:
5049:
4916:
4525:
4515:
4510:
4493:
4474:
4446:
4187:
4083:
3880:
3855:
3810:
3787:
3782:
3627:
3401:
3368:
3358:
3196:
3191:
3175:
3165:
3142:
2687:
2654:
2633:
2237:
1957:
1852:
1845:
1692:
1672:
1637:
1322:
1197:
673:
658:
558:
553:
525:
413:
3099:
1453:
894:
884:
864:
563:
5485:
5398:
5388:
5039:
5003:
4980:
4948:
4821:
4803:
4767:
4757:
4678:
4663:
4645:
4571:
4566:
4237:
4143:
4078:
3970:
3930:
3870:
3706:
3664:
3577:
3572:
3539:
3534:
3511:
3465:
3396:
3363:
3353:
3286:
3263:
3039:
2973:
2536:
2520:
2333:
2320:
2273:
2246:
2116:
2030:
1947:
1933:
1820:
1776:
1735:
1615:
1354:
1301:
1241:
777:
668:
548:
530:
481:
370:
71:
1894:
5428:
5418:
5393:
5351:
5241:
5236:
5220:
5182:
5149:
5126:
5034:
4998:
4693:
4469:
4128:
4113:
4108:
4098:
4005:
3985:
3975:
3935:
3905:
3850:
3692:
2953:
2936:
2919:
2909:
2839:
2794:
2772:
2734:
2585:
2388:
2058:
1753:
1661:
1044:
5281:
5210:
5144:
5121:
5104:
5044:
5017:
4884:
4874:
4839:
4683:
4543:
4520:
4464:
4023:
3950:
3945:
3915:
3837:
3760:
3746:
3723:
3687:
3659:
3622:
3567:
3562:
3470:
3309:
3211:
2928:
2818:
2679:
2609:
2564:
2449:
2383:
2191:
2186:
2111:
2053:
2042:
1835:
1682:
1552:
1505:
1479:
834:
714:
568:
5408:
5383:
5054:
4752:
4724:
4707:
4630:
4625:
4581:
4561:
4428:
3860:
3728:
3475:
3425:
3291:
2895:
2826:
2789:
2628:
2430:
2170:
2155:
2083:
1923:
1764:
1348:
1191:
617:
582:
57:
5542:
5469:
5258:
4781:
4747:
4729:
4668:
4608:
4179:
4123:
4118:
3845:
3494:
3480:
3447:
3406:
3373:
3336:
3206:
2573:
2303:
2226:
2175:
2078:
2005:
1964:
1942:
1803:
1252:
636:
508:
61:
4206:
5585:
4866:
4688:
4635:
4576:
4384:
4366:
4241:
3609:
3296:
3073:
2704:
2617:
2417:
2125:
2096:
2092:
1840:
1769:
1759:
994:
968:
828:
746:
404:
190:
131:
35:
332:
5535:
4990:
4965:
4934:
4911:
4894:
4502:
3738:
3637:
3184:
2643:
2553:
2509:
2478:
2461:
2438:
2121:
2067:
1742:
1646:
781:
422:
178:
123:
17:
3008:
339:
5460:
5451:
5290:
5229:
5159:
4553:
4249:
4170:
4161:
3278:
3051:
2991:
2697:
1727:
789:
468:
382:
305:
Paleozoic
Sedimentary Successions of the Virginia Valley & Ridge and Plateau
226:
5423:
5359:
5303:
5113:
5095:
4903:
4831:
4640:
4456:
4420:
4349:
3828:
3646:
3554:
3129:
2670:
2470:
2366:
1912:
1544:
1183:
820:
706:
243:
238:
5478:
5342:
5250:
5026:
4617:
4329:
4271:
3769:
3345:
3062:
2885:
1812:
800:
517:
393:
249:
4535:
3230:
1705:
445:
5333:
5169:
5064:
4957:
4926:
4857:
4739:
4716:
4655:
4599:
4402:
4358:
4313:
4302:
4260:
4070:
3797:
3715:
3674:
3600:
3457:
3434:
3388:
3327:
3043:
2876:
2545:
2501:
2408:
2218:
2164:
1997:
1794:
986:
609:
591:
540:
499:
374:
285:
186:
182:
163:
127:
119:
5527:
4813:
4340:
3526:
2348:
811:
683:
174:
5136:
4790:
4282:
3503:
2312:
645:
39:
1905:
1st Elk Sand, 2nd Elk Sand, 3rd Elk Sand, 4th Elk Sand, 5th Elk Sand
304:
86:
205:, Pennsylvania. They considered it part of the Onondaga Group.
4210:
3012:
750:
343:
5546:
284:
Relative age dating places the
Needmore in the middle
5477:
5468:
5459:
5450:
5350:
5341:
5332:
5289:
5280:
5249:
5228:
5219:
5168:
5135:
5112:
5103:
5094:
5063:
5025:
5016:
4989:
4956:
4947:
4925:
4902:
4893:
4865:
4856:
4830:
4812:
4789:
4780:
4738:
4715:
4706:
4654:
4616:
4607:
4598:
4552:
4534:
4501:
4492:
4455:
4437:
4419:
4401:
4392:
4383:
4357:
4348:
4339:
4328:
4312:
4301:
4281:
4270:
4259:
4248:
4178:
4169:
4160:
4069:
4022:
4004:
3836:
3827:
3796:
3768:
3759:
3737:
3714:
3705:
3673:
3645:
3636:
3608:
3599:
3553:
3525:
3502:
3493:
3456:
3433:
3424:
3387:
3344:
3335:
3326:
3277:
3229:
3183:
3174:
3128:
3090:
3081:
3072:
3061:
3050:
2990:
2927:
2918:
2884:
2875:
2817:
2771:
2678:
2669:
2608:
2544:
2535:
2500:
2469:
2460:
2416:
2407:
2365:
2347:
2311:
2302:
2217:
2163:
2154:
1996:
1811:
1802:
1793:
1726:
1704:
1645:
1636:
1543:
1339:
1182:
985:
976:
967:
819:
810:
799:
788:
705:
682:
644:
635:
608:
590:
581:
539:
516:
507:
498:
467:
444:
421:
412:
403:
392:
381:
152:
142:
137:
115:
107:
97:
92:
82:
77:
67:
53:
45:
29:
326:
324:
5652:Southern United States geologic formation stubs
5566:
4222:
3024:
762:
355:
314:
312:
8:
5573:
5559:
5474:
5465:
5456:
5347:
5338:
5286:
5225:
5109:
5100:
5022:
4953:
4899:
4862:
4786:
4712:
4613:
4604:
4498:
4398:
4389:
4354:
4345:
4336:
4309:
4278:
4267:
4256:
4229:
4215:
4207:
4175:
4166:
3833:
3765:
3711:
3642:
3605:
3499:
3430:
3341:
3332:
3180:
3087:
3078:
3069:
3058:
3031:
3017:
3009:
2924:
2881:
2675:
2541:
2466:
2413:
2308:
2160:
1808:
1799:
1642:
982:
973:
816:
807:
796:
769:
755:
747:
641:
587:
513:
504:
418:
409:
400:
389:
362:
348:
340:
26:
5647:Limestone formations of the United States
297:
217:, Maryland) as approximately 150 feet.
1591:Lower Connoquenessing Sandstone Member
1569:Upper Connoquenessing Sandstone Member
7:
5607:Geologic formations of West Virginia
5524:
5522:
225:DeWitt and Colton (1964) identified
5592:Geologic formations of Pennsylvania
943:Middle Washington Limestone Member
25:
1218:Lower Pittsburgh Limestone Member
1208:Upper Pittsburgh Limestone Member
953:Lower Washington Limestone Member
928:Upper Washington Limestone Member
5617:Devonian geology of Pennsylvania
5612:Devonian System of North America
5526:
1278:Lower Saltsburg Sandstone Member
1268:Upper Saltsburg Sandstone Member
1145:Lower Sewickley Sandstone Member
1134:Upper Sewickley Sandstone Member
5602:Geologic formations of Virginia
5597:Geologic formations of Maryland
1387:Upper Freeport Limestone Member
1371:Upper Freeport Limestone Member
1329:Lower Mahoning Sandstone Member
1318:Upper Mahoning Sandstone Member
5534:This article about a specific
1:
1527:Lower Mercer Limestone Member
1517:Upper Mercer Limestone Member
5632:Devonian geology of Virginia
5545:. You can help Knowledge by
213:, Pennsylvania, and most of
2284:Bobs Ridge Sandstone Member
1434:Kittanning Sandstone Member
1293:Bush Creek Limestone Member
1283:Pine Creek Limestone Member
1213:Little Pittsburgh coal seam
1141:"Meigis Creek" "No. 9 Coal"
1077:Waynesburg Limestone Member
5673:
5521:
4014:Pinesburg Station Dolomite
2375:Helderberg Group (geology)
2357:Helderberg Group (geology)
2339:Helderberg Group (geology)
1953:Huntley Mountain Formation
1417:Johnstone Limestone Member
1273:Woods Run Limestone Member
1155:Cedarville Sanstone Member
1150:Sewickley Limestone Member
1098:Uniontown Limestone Member
933:Jollytown Limestone Member
3305:
1559:Connoquenessing Formation
1496:Homewood Sandstone Member
1392:Freeport Sandstone Member
1082:Uniontown Sanstone Member
264:Type locality is between
156:Willard and Cleaves, 1939
34:
5657:Maryland geography stubs
3583:Wildcat Valley Sandstone
3545:Wildcat Valley Sandstone
1460:Vanport Limestone Member
1288:Buffalo Sandstone Member
1026:Middle Waynesburg Member
5414:Conococheague Formation
4089:Conococheague Limestone
3259:Little Valley Formation
2959:Pleasent Hill Formation
1376:Butler Sandstone Member
1166:Westone Sanstone Member
1067:Gilboy Sandstone Member
1036:Lower Waynesburg Member
1011:Upper Waynesburg Member
692:Corriganville Limestone
231:Coelospira acutiplicata
5637:Devonian West Virginia
4976:Williamsport Formation
4880:Bass Islands Formation
4052:Rockdale Run Formation
3921:Lincolnshire Formation
3866:Chatham Hill Formation
3153:Warren Point Formation
2426:Bass Islands Formation
1486:Beaver River Formation
1422:Middle Kittanning Coal
1087:Annabelle Shale Member
1072:Little Waynesburg Coal
1016:Little Washington Coal
147:Needmore, Pennsylvania
5622:Devonian Pennsylvania
5367:Copper Ridge Dolomite
5298:Wells Creek Formation
5201:Martinsburg Formation
5196:Dolly Ridge Formation
4971:Wills Creek Formation
4411:Monongahela Formation
4094:Copper Ridge Dolomite
3966:Rich Valley Formation
3926:Martinsburg Formation
3806:Massanutten Sandstone
3778:Massanutten Sandstone
2781:Wells Creek Formation
2746:Linden Hall Formation
2591:Goat Island Formation
2197:Skaneateles Formation
2146:Murrysville Sandstone
1756:"Big Injun Sandstone"
1428:Lower Kittanning Coal
1412:Upper Kittanning Coal
1263:Upper Bakerstown coal
1160:Redstone-Pomeroy coal
904:Upper Washington Coal
436:Mauch Chunk Formation
102:Appalachian Mountains
5434:Waynesboro Formation
5311:Beekmantown Dolomite
5155:Reedsville Formation
4674:West Falls Formation
4480:Pocahontas Formation
4139:Waynesboro Formation
4057:Stonehenge Limestone
4032:Chepultepec Dolomite
3961:Reedsville Formation
3941:New Market Limestone
3683:Bloomsburg Formation
3655:Bloomsburg Formation
3443:Mahantango Formation
3244:Fort Payne Formation
3202:Cove Creek Formation
2964:Waynesboro Formation
2905:Gatesburgh Formation
2861:Stonehenge Formation
2807:Bellefonte Formation
2764:Loyalsburg Formation
2693:Reedsville Formation
2329:Bois Blanc Formation
2209:Mahantango Formation
2036:Lock Haven Formation
2017:Sherman Creek Member
1981:Sherman Creek Member
1826:Lock Haven Formation
1718:Loyalhanna Formation
1714:Greenbrier Limestone
1581:Quakertown Fire Clay
1401:Kittanning Formation
1223:Connellsville Member
1171:Pittsburgh coal seam
1129:Upper Sewickley Coal
1114:Pittsburgh Formation
1001:Waynesburg Formation
918:Washington Formation
890:Prosperity Limestone
880:Claysville Limestone
875:Fish Creek Sandstone
697:Helderberg Formation
654:Helderberg Formation
600:Mahantango Formation
454:Greenbrier Formation
431:Greenbrier Formation
5498:Swift Run Formation
5272:St. Peter Sandstone
5178:Lexington Limestone
5073:Tuscarora Sandstone
5050:Rose Hill Formation
4917:Tonoloway Formation
4526:Bluefield Formation
4516:Princeton Sandstone
4511:Bluestone Formation
4475:New River Formation
4447:Allegheny Formation
4188:Swift Run Formation
4084:Conasauga Formation
4037:Kingsport Formation
3981:Ward Cove Limestone
3896:Five Oaks Limestone
3881:Eggleston Formation
3856:Blackford Formation
3811:Tuscarora Sandstone
3788:Tuscarora Sandstone
3783:Rose Hill Formation
3628:Tonoloway Limestone
3402:Foreknobs Formation
3369:Hampshire Formation
3359:Foreknobs Formation
3254:Hillsdale Formation
3222:Stony Gap Formation
3217:Princeton Formation
3197:Bluestone Formation
3192:Bluefield Formation
3120:Pikeville Formation
2688:Queenston Formation
2655:Tuscarora Formation
2634:Rose Hill Formation
2238:Marcellus Formation
2022:Irish Valley Member
1986:Irish Valley Member
1958:Hampshire Formation
1867:Chadakoin Formation
1846:Cussewago Formation
1831:Riceville Formation
1693:Bluefield Formation
1678:Princeton Formation
1673:Bluestone Formation
1611:Sharon Shale Member
1381:Lower Freeport Coal
1365:Upper Freeport Coal
1258:Pittsburgh Red Beds
1198:Casselman Formation
1104:Fulton Shale Member
1051:Uniontown Formation
845:Windy Gap Limestone
720:New Creek Limestone
559:Greenland Gap Group
554:Foreknobs Formation
526:Hampshire Formation
477:Purseland Sandstone
459:Purseland Sandstone
256:) in the Needmore.
235:Eodevonaria arcuata
36:Stratigraphic range
5486:Catoctin Formation
5399:Weverton Formation
5389:Antietam Formation
5316:Rose Run Sandstone
5206:Nealmont Limestone
5040:McKenzie Formation
5004:McKenzie Formation
4981:McKenzie Formation
4822:Oriskany Sandstone
4804:Huntersville Chert
4768:Huntersville Chert
4758:Onondaga Limestone
4664:Brallier Formation
4646:Brallier Formation
4572:Maccrady Formation
4567:Cuyahoga Formation
4319:Igneous intrusives
4288:Igneous intrusives
4238:Chronostratigraphy
4144:Weverton Formation
4079:Antietam Formation
4042:Longview Limestone
3971:Rockdell Formation
3931:Moccasin Formation
3871:Edinburg Formation
3665:McKenzie Formation
3578:Ridgeley Sandstone
3573:Oriskany Sandstone
3540:Ridgeley Sandstone
3535:Oriskany Sandstone
3512:Huntersville Chert
3466:Huntersville Chert
3397:Brallier Formation
3364:Cloyd Conglomerate
3354:Brallier Formation
3287:Maccrady Formation
3264:Maccrady Formation
3148:Sewannee Formation
3138:Bee Rock Formation
3040:Chronostratigraphy
2974:Antietam Formation
2969:Tomstown Formation
2521:Syracuse Formation
2490:Camillus Formation
2334:Oriskany Formation
2321:Huntersville Chert
2274:Huntersville Chert
2247:Onondaga Limestone
2141:Knapp Conglomerate
2117:Penn Yan Formation
2031:Brallier Formation
1948:Rockwell Formation
1821:Brallier Formation
1777:Rockwell Formation
1736:Cuyahoga Formation
1655:Shenango Formation
1355:Freeport Formation
1302:Mahoning Formation
1242:Glenshaw Formation
1031:Waynesburg“A” coal
1021:Waynesburg“B” coal
778:Chronostratigraphy
669:Oriskany Sandstone
549:Brallier Formation
531:Rockwell Formation
482:Rockwell Formation
371:Chronostratigraphy
254:Favulella favulosa
167:Needmore Formation
72:Oriskany Formation
30:Needmore Formation
18:Needmore Formation
5627:Devonian Maryland
5554:
5553:
5541:in Maryland is a
5519:
5518:
5515:
5514:
5511:
5510:
5503:Grenville Complex
5493:
5492:
5446:
5445:
5442:
5441:
5429:Tomstown Dolomite
5419:Elbrook Formation
5403:Loudoun Formation
5394:Harpers Formation
5379:
5378:
5375:
5374:
5328:
5327:
5324:
5323:
5267:
5266:
5242:Black River Group
5237:Trenton Limestone
5191:
5190:
5183:Trenton Limestone
5150:Juniata Formation
5127:Juniata Formation
5090:
5089:
5086:
5085:
5078:Clinton Sandstone
5035:Lockport Dolomite
5012:
5011:
4999:Lockport Dolomite
4943:
4942:
4852:
4851:
4848:
4847:
4776:
4775:
4702:
4701:
4694:Genesee Formation
4594:
4593:
4590:
4589:
4488:
4487:
4470:Kanawha Formation
4379:
4378:
4375:
4374:
4324:
4323:
4297:
4296:
4293:
4292:
4204:
4203:
4200:
4199:
4196:
4195:
4156:
4155:
4152:
4151:
4129:Tomstown Dolomite
4114:Harpers Formation
4109:Hampton Formation
4099:Elbrook Formation
4065:
4064:
3986:Wardell Formation
3976:Trenton Limestone
3936:Mosheim Limestone
3906:Juniata Formation
3901:Gratton Formation
3851:Benbolt Formation
3823:
3822:
3819:
3818:
3755:
3754:
3701:
3700:
3693:Lockport Dolomite
3595:
3594:
3591:
3590:
3489:
3488:
3420:
3419:
3322:
3321:
3318:
3317:
3269:Taggard Formation
3161:
3160:
3006:
3005:
2999:Grenville Complex
2986:
2985:
2982:
2981:
2954:Potsdam Formation
2949:
2948:
2945:
2944:
2937:Kinzers Formation
2910:Warrior Formation
2871:
2870:
2856:Nittany Formation
2840:Beekmantown Group
2795:Beekmantown Group
2735:Black River Group
2665:
2664:
2604:
2603:
2595:Gasport Formation
2586:Eramosa Formation
2531:
2530:
2403:
2402:
2399:
2398:
2389:Manlius Limestone
2298:
2297:
2202:Tichnor Formation
2136:
2135:
2059:Rhinestreet Shale
1929:Chagrin Formation
1789:
1788:
1785:
1784:
1754:Burgoon Formation
1662:Mauch Chunk Group
1632:
1631:
1532:Lower Mercer Coal
1522:Upper Mercer Coal
1471:Brookville Member
1443:Clarian Formation
1233:Birmingham Member
1228:Morgantown Member
1124:Benwood Limestone
1045:Monongahela Group
963:
962:
870:Nineveh Limestone
860:Nineveh Sandstone
855:Gilmore Sandstone
744:
743:
740:
739:
736:
735:
732:
731:
728:
727:
631:
630:
577:
576:
494:
493:
490:
489:
260:Notable Exposures
160:
159:
16:(Redirected from
5664:
5575:
5568:
5561:
5530:
5523:
5475:
5466:
5457:
5348:
5339:
5287:
5226:
5211:Oswego Formation
5145:Cincinnati Group
5122:Cincinnati Group
5110:
5101:
5045:Keefer Formation
5023:
4954:
4900:
4885:Keyser Formation
4875:Bertie Formation
4863:
4840:Helderberg Group
4787:
4713:
4684:Sonyea Formation
4614:
4605:
4544:Greenbrier Group
4521:Hinton Formation
4499:
4465:Pottsville Group
4399:
4390:
4355:
4346:
4337:
4332:
4310:
4305:
4279:
4274:
4268:
4263:
4257:
4252:
4231:
4224:
4217:
4208:
4176:
4167:
4134:Unicoi Formation
3996:Witten Formation
3991:Wassum Formation
3956:Paperville Shale
3951:Oswego Formation
3946:Oranda Formation
3916:Lenoir Formation
3891:Fetzer Limestone
3834:
3766:
3747:Keefer Sandstone
3724:Keefer Sandstone
3712:
3688:Keefer Sandstone
3660:Keefer Sandstone
3643:
3623:Keyser Limestone
3618:Hancock Dolomite
3606:
3568:Keyser Limestone
3563:Helderberg Group
3500:
3471:Tioga Bentonites
3431:
3342:
3333:
3310:Pocono Formation
3249:Gasper Formation
3239:Denmar Formation
3212:Hinton Formation
3181:
3105:Grundy Formation
3088:
3079:
3070:
3065:
3059:
3054:
3033:
3026:
3019:
3010:
2925:
2882:
2851:Axeman Formation
2756:Hatter Formation
2751:Snyder Formation
2726:Rodman Formation
2721:Salona Formation
2716:Coburn Formation
2676:
2582:Guelph Formation
2565:Vernon Formation
2542:
2467:
2450:Bertie Formation
2414:
2384:Keyser Formation
2309:
2192:Ludlow Formation
2187:Moscow Formation
2161:
2112:West River Shale
2054:Angola Formation
2043:West Falls Group
1976:Duncannon Member
1836:Oswayo Formation
1809:
1800:
1688:Maxton Sandstone
1683:Hinton Formation
1643:
1622:Sharon Sandstone
1600:Sharon Formation
1586:Quakertown Shale
1553:Pottsville Group
1506:Mercer Formation
1480:Pottsville Group
983:
974:
900:Donley Limestone
835:Greene Formation
817:
808:
803:
797:
792:
771:
764:
757:
748:
715:Keyser Limestone
642:
588:
569:Scherr Formation
514:
505:
419:
410:
401:
396:
390:
385:
364:
357:
350:
341:
334:
328:
319:
316:
307:
302:
276:, Pennsylvania.
27:
21:
5672:
5671:
5667:
5666:
5665:
5663:
5662:
5661:
5582:
5581:
5580:
5579:
5520:
5507:
5489:
5438:
5409:Conasauga Group
5384:Chilhowee Group
5371:
5320:
5276:
5263:
5245:
5215:
5187:
5164:
5131:
5082:
5059:
5055:Rochester Shale
5008:
4985:
4939:
4921:
4889:
4844:
4826:
4808:
4772:
4753:Marcellus Shale
4734:
4725:Tully Limestone
4698:
4650:
4631:Berea Sandstone
4626:Price Formation
4586:
4582:Berea Sandstone
4562:Price Formation
4548:
4530:
4484:
4451:
4433:
4429:Conemaugh Group
4415:
4371:
4330:
4320:
4303:
4289:
4272:
4261:
4250:
4244:
4235:
4205:
4192:
4148:
4104:Erwin Formation
4061:
4047:Mascot Dolomite
4018:
4000:
3911:Knobs Formation
3886:Elway Limestone
3876:Effna Limestone
3861:Bowen Formation
3815:
3792:
3751:
3733:
3729:Rochester Shale
3697:
3669:
3632:
3587:
3549:
3521:
3485:
3476:Marcellus Shale
3452:
3416:
3412:Pound Formation
3383:
3379:Pound Formation
3314:
3301:
3292:Price Formation
3273:
3225:
3170:
3157:
3124:
3110:Hyden Formation
3063:
3052:
3046:
3037:
3007:
3002:
2978:
2941:
2914:
2896:Knox Supergroup
2867:
2827:Knox Supergroup
2813:
2790:Knox Supergroup
2767:
2661:
2629:Rochester Shale
2600:
2527:
2496:
2456:
2433:
2431:Akron Formation
2395:
2361:
2343:
2294:
2213:
2171:Tully Limestone
2150:
2132:
2084:Middlesex Shale
1992:
1924:Cleveland Shale
1781:
1765:Berea Sandstone
1722:
1700:
1628:
1575:Quakertown Coal
1571:"2nd Salt Sand"
1557:
1539:
1498:"1st Salt Sand"
1484:
1465:Brookville Coal
1353:
1349:Allegheny Group
1335:
1313:Bush Creek Coal
1196:
1192:Conemaugh Group
1178:
1112:
1061:Waynesburg coal
1049:
999:
959:
948:Washington Coal
916:
908:Rockport Member
833:
801:
790:
784:
775:
745:
724:
701:
678:
627:
618:Marcellus Shale
604:
573:
535:
486:
463:
440:
394:
383:
377:
368:
338:
337:
329:
322:
317:
310:
303:
299:
294:
282:
262:
223:
215:Allegany County
199:
58:Marcellus Shale
23:
22:
15:
12:
11:
5:
5670:
5668:
5660:
5659:
5654:
5649:
5644:
5639:
5634:
5629:
5624:
5619:
5614:
5609:
5604:
5599:
5594:
5584:
5583:
5578:
5577:
5570:
5563:
5555:
5552:
5551:
5531:
5517:
5516:
5513:
5512:
5509:
5508:
5506:
5505:
5500:
5494:
5491:
5490:
5488:
5483:
5481:
5472:
5463:
5454:
5448:
5447:
5444:
5443:
5440:
5439:
5437:
5436:
5431:
5426:
5421:
5416:
5411:
5405:
5404:
5401:
5396:
5391:
5386:
5380:
5377:
5376:
5373:
5372:
5370:
5369:
5363:
5362:
5356:
5354:
5345:
5336:
5330:
5329:
5326:
5325:
5322:
5321:
5319:
5318:
5313:
5307:
5306:
5300:
5295:
5293:
5284:
5278:
5277:
5275:
5274:
5268:
5265:
5264:
5262:
5261:
5259:St. Paul Group
5255:
5253:
5247:
5246:
5244:
5239:
5234:
5232:
5223:
5217:
5216:
5214:
5213:
5208:
5203:
5198:
5192:
5189:
5188:
5186:
5185:
5180:
5174:
5172:
5166:
5165:
5163:
5162:
5157:
5152:
5147:
5141:
5139:
5133:
5132:
5130:
5129:
5124:
5118:
5116:
5107:
5098:
5092:
5091:
5088:
5087:
5084:
5083:
5081:
5080:
5075:
5069:
5067:
5061:
5060:
5058:
5057:
5052:
5047:
5042:
5037:
5031:
5029:
5020:
5014:
5013:
5010:
5009:
5007:
5006:
5001:
4995:
4993:
4987:
4986:
4984:
4983:
4978:
4973:
4968:
4962:
4960:
4951:
4945:
4944:
4941:
4940:
4938:
4937:
4931:
4929:
4923:
4922:
4920:
4919:
4914:
4908:
4906:
4897:
4891:
4890:
4888:
4887:
4882:
4877:
4871:
4869:
4860:
4854:
4853:
4850:
4849:
4846:
4845:
4843:
4842:
4836:
4834:
4828:
4827:
4825:
4824:
4818:
4816:
4810:
4809:
4807:
4806:
4801:
4799:Needmore Shale
4795:
4793:
4784:
4778:
4777:
4774:
4773:
4771:
4770:
4765:
4763:Needmore Shale
4760:
4755:
4750:
4748:Hamilton Group
4744:
4742:
4736:
4735:
4733:
4732:
4730:Hamilton Group
4727:
4721:
4719:
4710:
4704:
4703:
4700:
4699:
4697:
4696:
4691:
4686:
4681:
4676:
4671:
4669:Java Formation
4666:
4660:
4658:
4652:
4651:
4649:
4648:
4643:
4638:
4633:
4628:
4622:
4620:
4611:
4602:
4596:
4595:
4592:
4591:
4588:
4587:
4585:
4584:
4579:
4574:
4569:
4564:
4558:
4556:
4550:
4549:
4547:
4546:
4540:
4538:
4532:
4531:
4529:
4528:
4523:
4518:
4513:
4507:
4505:
4496:
4490:
4489:
4486:
4485:
4483:
4482:
4477:
4472:
4467:
4461:
4459:
4453:
4452:
4450:
4449:
4443:
4441:
4435:
4434:
4432:
4431:
4425:
4423:
4417:
4416:
4414:
4413:
4407:
4405:
4396:
4387:
4381:
4380:
4377:
4376:
4373:
4372:
4370:
4369:
4363:
4361:
4352:
4343:
4334:
4326:
4325:
4322:
4321:
4318:
4316:
4307:
4299:
4298:
4295:
4294:
4291:
4290:
4287:
4285:
4276:
4265:
4254:
4246:
4245:
4236:
4234:
4233:
4226:
4219:
4211:
4202:
4201:
4198:
4197:
4194:
4193:
4191:
4190:
4184:
4182:
4173:
4164:
4158:
4157:
4154:
4153:
4150:
4149:
4147:
4146:
4141:
4136:
4131:
4126:
4124:Shady Dolomite
4121:
4119:Rome Formation
4116:
4111:
4106:
4101:
4096:
4091:
4086:
4081:
4075:
4073:
4067:
4066:
4063:
4062:
4060:
4059:
4054:
4049:
4044:
4039:
4034:
4028:
4026:
4020:
4019:
4017:
4016:
4010:
4008:
4002:
4001:
3999:
3998:
3993:
3988:
3983:
3978:
3973:
3968:
3963:
3958:
3953:
3948:
3943:
3938:
3933:
3928:
3923:
3918:
3913:
3908:
3903:
3898:
3893:
3888:
3883:
3878:
3873:
3868:
3863:
3858:
3853:
3848:
3846:Bays Formation
3842:
3840:
3831:
3825:
3824:
3821:
3820:
3817:
3816:
3814:
3813:
3808:
3802:
3800:
3794:
3793:
3791:
3790:
3785:
3780:
3774:
3772:
3763:
3757:
3756:
3753:
3752:
3750:
3749:
3743:
3741:
3735:
3734:
3732:
3731:
3726:
3720:
3718:
3709:
3703:
3702:
3699:
3698:
3696:
3695:
3690:
3685:
3679:
3677:
3671:
3670:
3668:
3667:
3662:
3657:
3651:
3649:
3640:
3634:
3633:
3631:
3630:
3625:
3620:
3614:
3612:
3603:
3597:
3596:
3593:
3592:
3589:
3588:
3586:
3585:
3580:
3575:
3570:
3565:
3559:
3557:
3551:
3550:
3548:
3547:
3542:
3537:
3531:
3529:
3523:
3522:
3520:
3519:
3517:Needmore Shale
3514:
3508:
3506:
3497:
3491:
3490:
3487:
3486:
3484:
3483:
3481:Millboro Shale
3478:
3473:
3468:
3462:
3460:
3454:
3453:
3451:
3450:
3448:Millboro Shale
3445:
3439:
3437:
3428:
3422:
3421:
3418:
3417:
3415:
3414:
3409:
3407:Millboro Shale
3404:
3399:
3393:
3391:
3385:
3384:
3382:
3381:
3376:
3374:Millboro Shale
3371:
3366:
3361:
3356:
3350:
3348:
3339:
3330:
3324:
3323:
3320:
3319:
3316:
3315:
3313:
3312:
3306:
3303:
3302:
3300:
3299:
3294:
3289:
3283:
3281:
3275:
3274:
3272:
3271:
3266:
3261:
3256:
3251:
3246:
3241:
3235:
3233:
3227:
3226:
3224:
3219:
3214:
3209:
3207:Fido Sandstone
3204:
3199:
3194:
3189:
3187:
3178:
3172:
3171:
3169:
3168:
3162:
3159:
3158:
3156:
3155:
3150:
3145:
3140:
3134:
3132:
3126:
3125:
3123:
3122:
3117:
3115:Kendrick Shale
3112:
3107:
3102:
3096:
3094:
3085:
3076:
3067:
3056:
3048:
3047:
3038:
3036:
3035:
3028:
3021:
3013:
3004:
3003:
3001:
2996:
2994:
2988:
2987:
2984:
2983:
2980:
2979:
2977:
2976:
2971:
2966:
2961:
2956:
2950:
2947:
2946:
2943:
2942:
2940:
2939:
2933:
2931:
2922:
2916:
2915:
2913:
2912:
2907:
2901:
2900:
2899:
2898:
2890:
2888:
2879:
2873:
2872:
2869:
2868:
2866:
2865:
2864:
2863:
2858:
2853:
2845:
2844:
2842:
2836:
2835:
2834:
2833:
2829:
2823:
2821:
2815:
2814:
2812:
2811:
2810:
2809:
2801:
2800:
2799:
2798:
2792:
2784:
2783:
2777:
2775:
2769:
2768:
2761:
2760:
2759:
2758:
2753:
2748:
2740:
2739:
2737:
2731:
2730:
2729:
2728:
2723:
2718:
2710:
2709:
2707:
2701:
2700:
2695:
2690:
2684:
2682:
2673:
2667:
2666:
2663:
2662:
2660:
2659:
2658:
2657:
2649:
2648:
2646:
2640:
2639:
2638:
2637:
2631:
2623:
2622:
2620:
2614:
2612:
2606:
2605:
2602:
2601:
2599:
2598:
2597:
2596:
2593:
2588:
2583:
2577:
2576:
2574:Lockport Group
2570:
2569:
2568:
2567:
2559:
2558:
2556:
2550:
2548:
2539:
2533:
2532:
2529:
2528:
2526:
2525:
2524:
2523:
2515:
2514:
2512:
2506:
2504:
2498:
2497:
2495:
2494:
2493:
2492:
2484:
2483:
2481:
2475:
2473:
2464:
2458:
2457:
2455:
2454:
2453:
2452:
2444:
2443:
2441:
2435:
2434:
2428:
2422:
2420:
2411:
2405:
2404:
2401:
2400:
2397:
2396:
2394:
2393:
2392:
2391:
2386:
2378:
2377:
2371:
2369:
2363:
2362:
2360:
2359:
2353:
2351:
2345:
2344:
2342:
2341:
2336:
2331:
2325:Needmore Shale
2317:
2315:
2306:
2300:
2299:
2296:
2295:
2293:
2292:
2290:Needmore Shale
2287:
2286:
2285:
2279:
2278:
2277:
2276:
2268:
2267:
2266:
2265:
2262:
2259:
2256:
2250:
2249:
2243:
2242:
2241:
2240:
2232:
2231:
2229:
2227:Hamilton Group
2223:
2221:
2215:
2214:
2212:
2211:
2206:
2205:
2204:
2199:
2194:
2189:
2181:
2180:
2178:
2176:Hamilton Group
2169:
2167:
2158:
2152:
2151:
2149:
2148:
2143:
2137:
2134:
2133:
2131:
2130:
2129:
2128:
2119:
2114:
2106:
2105:
2104:
2103:
2099:
2089:
2088:
2087:
2086:
2081:
2079:Cashaqua Shale
2073:
2072:
2070:
2064:
2063:
2062:
2061:
2056:
2048:
2047:
2045:
2039:
2038:
2033:
2027:
2026:
2025:
2024:
2019:
2011:
2010:
2008:
2006:Catskill Group
2002:
2000:
1994:
1993:
1991:
1990:
1989:
1988:
1983:
1978:
1970:
1969:
1967:
1965:Catskill Group
1961:
1960:
1955:
1950:
1945:
1943:Java Formation
1939:
1938:
1937:
1936:
1931:
1926:
1918:
1917:
1915:
1909:
1908:
1907:
1906:
1900:
1899:
1897:
1891:
1890:
1889:
1888:
1882:
1881:
1879:
1877:Bradford Group
1873:
1872:
1871:
1870:
1869:, First Warren
1864:
1858:
1857:
1855:
1849:
1848:
1843:
1838:
1833:
1828:
1823:
1817:
1815:
1806:
1797:
1791:
1790:
1787:
1786:
1783:
1782:
1780:
1779:
1774:
1773:
1772:
1767:
1762:
1757:
1748:
1747:
1745:
1739:
1738:
1732:
1730:
1724:
1723:
1721:
1720:
1710:
1708:
1702:
1701:
1699:
1698:
1697:
1696:
1690:
1685:
1680:
1675:
1667:
1666:
1664:
1658:
1657:
1651:
1649:
1640:
1634:
1633:
1630:
1629:
1627:
1626:
1625:
1624:
1619:
1613:
1605:
1604:
1602:
1596:
1595:
1594:
1593:
1588:
1583:
1578:
1572:
1563:
1562:
1555:
1549:
1547:
1541:
1540:
1538:
1537:
1536:
1535:
1529:
1524:
1519:
1511:
1510:
1508:
1502:
1501:
1500:
1499:
1490:
1489:
1482:
1476:
1475:
1474:
1473:
1468:
1462:
1457:
1448:
1447:
1445:
1439:
1438:
1437:
1436:
1431:
1425:
1419:
1414:
1406:
1405:
1403:
1397:
1396:
1395:
1394:
1389:
1384:
1378:
1373:
1368:
1359:
1358:
1351:
1345:
1343:
1337:
1336:
1334:
1333:
1332:
1331:
1326:
1320:
1315:
1307:
1306:
1304:
1298:
1297:
1296:
1295:
1290:
1285:
1280:
1275:
1270:
1265:
1260:
1255:
1253:Ames Limestone
1247:
1246:
1244:
1238:
1237:
1236:
1235:
1230:
1225:
1220:
1215:
1210:
1202:
1201:
1194:
1188:
1186:
1180:
1179:
1177:
1176:
1175:
1174:
1168:
1163:
1157:
1152:
1147:
1142:
1139:Sewickley Coal
1136:
1131:
1126:
1118:
1117:
1109:
1108:
1107:
1106:
1101:
1095:
1092:Uniontown Coal
1089:
1084:
1079:
1074:
1069:
1064:
1055:
1054:
1047:
1041:
1040:
1039:
1038:
1033:
1028:
1023:
1018:
1013:
1005:
1004:
997:
991:
989:
980:
971:
965:
964:
961:
960:
958:
957:
956:
955:
950:
945:
940:
938:Jollytown Coal
935:
930:
922:
921:
913:
912:
911:
910:
905:
902:
897:
892:
887:
882:
877:
872:
867:
862:
857:
852:
850:Windy Gap Coal
847:
839:
838:
831:
825:
823:
814:
805:
794:
786:
785:
776:
774:
773:
766:
759:
751:
742:
741:
738:
737:
734:
733:
730:
729:
726:
725:
723:
722:
717:
711:
709:
703:
702:
700:
699:
694:
688:
686:
680:
679:
677:
676:
671:
666:
664:Needmore Shale
661:
656:
650:
648:
639:
633:
632:
629:
628:
626:
625:
623:Needmore Shale
620:
614:
612:
606:
605:
603:
602:
596:
594:
585:
579:
578:
575:
574:
572:
571:
566:
561:
556:
551:
545:
543:
537:
536:
534:
533:
528:
522:
520:
511:
502:
496:
495:
492:
491:
488:
487:
485:
484:
479:
473:
471:
465:
464:
462:
461:
456:
450:
448:
442:
441:
439:
438:
433:
427:
425:
416:
407:
398:
387:
379:
378:
369:
367:
366:
359:
352:
344:
336:
335:
320:
308:
296:
295:
293:
290:
281:
278:
261:
258:
222:
219:
211:Bedford County
198:
195:
171:Needmore Shale
158:
157:
154:
150:
149:
144:
140:
139:
135:
134:
117:
113:
112:
109:
105:
104:
99:
95:
94:
90:
89:
84:
80:
79:
75:
74:
69:
65:
64:
62:Millboro Shale
55:
51:
50:
47:
43:
42:
32:
31:
24:
14:
13:
10:
9:
6:
4:
3:
2:
5669:
5658:
5655:
5653:
5650:
5648:
5645:
5643:
5640:
5638:
5635:
5633:
5630:
5628:
5625:
5623:
5620:
5618:
5615:
5613:
5610:
5608:
5605:
5603:
5600:
5598:
5595:
5593:
5590:
5589:
5587:
5576:
5571:
5569:
5564:
5562:
5557:
5556:
5550:
5548:
5544:
5540:
5537:
5536:stratigraphic
5532:
5529:
5525:
5504:
5501:
5499:
5496:
5495:
5487:
5484:
5482:
5480:
5476:
5473:
5471:
5467:
5464:
5462:
5458:
5455:
5453:
5449:
5435:
5432:
5430:
5427:
5425:
5422:
5420:
5417:
5415:
5412:
5410:
5407:
5406:
5402:
5400:
5397:
5395:
5392:
5390:
5387:
5385:
5382:
5381:
5368:
5365:
5364:
5361:
5358:
5357:
5355:
5353:
5349:
5346:
5344:
5340:
5337:
5335:
5331:
5317:
5314:
5312:
5309:
5308:
5305:
5302:
5301:
5299:
5296:
5294:
5292:
5288:
5285:
5283:
5279:
5273:
5270:
5269:
5260:
5257:
5256:
5254:
5252:
5248:
5243:
5240:
5238:
5235:
5233:
5231:
5227:
5224:
5222:
5218:
5212:
5209:
5207:
5204:
5202:
5199:
5197:
5194:
5193:
5184:
5181:
5179:
5176:
5175:
5173:
5171:
5167:
5161:
5158:
5156:
5153:
5151:
5148:
5146:
5143:
5142:
5140:
5138:
5134:
5128:
5125:
5123:
5120:
5119:
5117:
5115:
5111:
5108:
5106:
5102:
5099:
5097:
5093:
5079:
5076:
5074:
5071:
5070:
5068:
5066:
5062:
5056:
5053:
5051:
5048:
5046:
5043:
5041:
5038:
5036:
5033:
5032:
5030:
5028:
5024:
5021:
5019:
5015:
5005:
5002:
5000:
4997:
4996:
4994:
4992:
4988:
4982:
4979:
4977:
4974:
4972:
4969:
4967:
4964:
4963:
4961:
4959:
4955:
4952:
4950:
4946:
4936:
4933:
4932:
4930:
4928:
4924:
4918:
4915:
4913:
4910:
4909:
4907:
4905:
4901:
4898:
4896:
4892:
4886:
4883:
4881:
4878:
4876:
4873:
4872:
4870:
4868:
4864:
4861:
4859:
4855:
4841:
4838:
4837:
4835:
4833:
4829:
4823:
4820:
4819:
4817:
4815:
4811:
4805:
4802:
4800:
4797:
4796:
4794:
4792:
4788:
4785:
4783:
4779:
4769:
4766:
4764:
4761:
4759:
4756:
4754:
4751:
4749:
4746:
4745:
4743:
4741:
4737:
4731:
4728:
4726:
4723:
4722:
4720:
4718:
4714:
4711:
4709:
4705:
4695:
4692:
4690:
4689:Harrell Shale
4687:
4685:
4682:
4680:
4677:
4675:
4672:
4670:
4667:
4665:
4662:
4661:
4659:
4657:
4653:
4647:
4644:
4642:
4639:
4637:
4636:Bedford Shale
4634:
4632:
4629:
4627:
4624:
4623:
4621:
4619:
4615:
4612:
4610:
4606:
4603:
4601:
4597:
4583:
4580:
4578:
4577:Sunbury Shale
4575:
4573:
4570:
4568:
4565:
4563:
4560:
4559:
4557:
4555:
4551:
4545:
4542:
4541:
4539:
4537:
4533:
4527:
4524:
4522:
4519:
4517:
4514:
4512:
4509:
4508:
4506:
4504:
4500:
4497:
4495:
4491:
4481:
4478:
4476:
4473:
4471:
4468:
4466:
4463:
4462:
4460:
4458:
4454:
4448:
4445:
4444:
4442:
4440:
4436:
4430:
4427:
4426:
4424:
4422:
4418:
4412:
4409:
4408:
4406:
4404:
4400:
4397:
4395:
4391:
4388:
4386:
4382:
4368:
4367:Dunkard Group
4365:
4364:
4362:
4360:
4356:
4353:
4351:
4347:
4344:
4342:
4338:
4335:
4333:
4327:
4317:
4315:
4311:
4308:
4306:
4300:
4286:
4284:
4280:
4277:
4275:
4269:
4266:
4264:
4258:
4255:
4253:
4247:
4243:
4242:West Virginia
4239:
4232:
4227:
4225:
4220:
4218:
4213:
4212:
4209:
4189:
4186:
4185:
4183:
4181:
4177:
4174:
4172:
4168:
4165:
4163:
4159:
4145:
4142:
4140:
4137:
4135:
4132:
4130:
4127:
4125:
4122:
4120:
4117:
4115:
4112:
4110:
4107:
4105:
4102:
4100:
4097:
4095:
4092:
4090:
4087:
4085:
4082:
4080:
4077:
4076:
4074:
4072:
4068:
4058:
4055:
4053:
4050:
4048:
4045:
4043:
4040:
4038:
4035:
4033:
4030:
4029:
4027:
4025:
4021:
4015:
4012:
4011:
4009:
4007:
4003:
3997:
3994:
3992:
3989:
3987:
3984:
3982:
3979:
3977:
3974:
3972:
3969:
3967:
3964:
3962:
3959:
3957:
3954:
3952:
3949:
3947:
3944:
3942:
3939:
3937:
3934:
3932:
3929:
3927:
3924:
3922:
3919:
3917:
3914:
3912:
3909:
3907:
3904:
3902:
3899:
3897:
3894:
3892:
3889:
3887:
3884:
3882:
3879:
3877:
3874:
3872:
3869:
3867:
3864:
3862:
3859:
3857:
3854:
3852:
3849:
3847:
3844:
3843:
3841:
3839:
3835:
3832:
3830:
3826:
3812:
3809:
3807:
3804:
3803:
3801:
3799:
3795:
3789:
3786:
3784:
3781:
3779:
3776:
3775:
3773:
3771:
3767:
3764:
3762:
3758:
3748:
3745:
3744:
3742:
3740:
3736:
3730:
3727:
3725:
3722:
3721:
3719:
3717:
3713:
3710:
3708:
3704:
3694:
3691:
3689:
3686:
3684:
3681:
3680:
3678:
3676:
3672:
3666:
3663:
3661:
3658:
3656:
3653:
3652:
3650:
3648:
3644:
3641:
3639:
3635:
3629:
3626:
3624:
3621:
3619:
3616:
3615:
3613:
3611:
3607:
3604:
3602:
3598:
3584:
3581:
3579:
3576:
3574:
3571:
3569:
3566:
3564:
3561:
3560:
3558:
3556:
3552:
3546:
3543:
3541:
3538:
3536:
3533:
3532:
3530:
3528:
3524:
3518:
3515:
3513:
3510:
3509:
3507:
3505:
3501:
3498:
3496:
3492:
3482:
3479:
3477:
3474:
3472:
3469:
3467:
3464:
3463:
3461:
3459:
3455:
3449:
3446:
3444:
3441:
3440:
3438:
3436:
3432:
3429:
3427:
3423:
3413:
3410:
3408:
3405:
3403:
3400:
3398:
3395:
3394:
3392:
3390:
3386:
3380:
3377:
3375:
3372:
3370:
3367:
3365:
3362:
3360:
3357:
3355:
3352:
3351:
3349:
3347:
3343:
3340:
3338:
3334:
3331:
3329:
3325:
3311:
3308:
3307:
3304:
3298:
3297:Sunbury Shale
3295:
3293:
3290:
3288:
3285:
3284:
3282:
3280:
3276:
3270:
3267:
3265:
3262:
3260:
3257:
3255:
3252:
3250:
3247:
3245:
3242:
3240:
3237:
3236:
3234:
3232:
3228:
3223:
3220:
3218:
3215:
3213:
3210:
3208:
3205:
3203:
3200:
3198:
3195:
3193:
3190:
3188:
3186:
3182:
3179:
3177:
3173:
3167:
3166:Lee Formation
3164:
3163:
3154:
3151:
3149:
3146:
3144:
3143:Hensley Shale
3141:
3139:
3136:
3135:
3133:
3131:
3127:
3121:
3118:
3116:
3113:
3111:
3108:
3106:
3103:
3101:
3098:
3097:
3095:
3093:
3089:
3086:
3084:
3080:
3077:
3075:
3071:
3068:
3066:
3060:
3057:
3055:
3049:
3045:
3041:
3034:
3029:
3027:
3022:
3020:
3015:
3014:
3011:
3000:
2997:
2995:
2993:
2989:
2975:
2972:
2970:
2967:
2965:
2962:
2960:
2957:
2955:
2952:
2951:
2938:
2935:
2934:
2932:
2930:
2926:
2923:
2921:
2917:
2911:
2908:
2906:
2903:
2902:
2897:
2894:
2893:
2892:
2891:
2889:
2887:
2883:
2880:
2878:
2874:
2862:
2859:
2857:
2854:
2852:
2849:
2848:
2847:
2846:
2843:
2841:
2838:
2837:
2832:
2831:
2830:
2828:
2825:
2824:
2822:
2820:
2816:
2808:
2805:
2804:
2803:
2802:
2796:
2793:
2791:
2788:
2787:
2786:
2785:
2782:
2779:
2778:
2776:
2774:
2770:
2766:
2765:
2757:
2754:
2752:
2749:
2747:
2744:
2743:
2742:
2741:
2738:
2736:
2733:
2732:
2727:
2724:
2722:
2719:
2717:
2714:
2713:
2712:
2711:
2708:
2706:
2705:Trenton Group
2703:
2702:
2699:
2696:
2694:
2691:
2689:
2686:
2685:
2683:
2681:
2677:
2674:
2672:
2668:
2656:
2653:
2652:
2651:
2650:
2647:
2645:
2642:
2641:
2636:"Red Clinton"
2635:
2632:
2630:
2627:
2626:
2625:
2624:
2621:
2619:
2618:Clinton Group
2616:
2615:
2613:
2611:
2607:
2594:
2592:
2589:
2587:
2584:
2581:
2580:
2579:
2578:
2575:
2572:
2571:
2566:
2563:
2562:
2561:
2560:
2557:
2555:
2552:
2551:
2549:
2547:
2543:
2540:
2538:
2534:
2522:
2519:
2518:
2517:
2516:
2513:
2511:
2508:
2507:
2505:
2503:
2499:
2491:
2488:
2487:
2486:
2485:
2482:
2480:
2477:
2476:
2474:
2472:
2468:
2465:
2463:
2459:
2451:
2448:
2447:
2446:
2445:
2442:
2440:
2437:
2436:
2432:
2429:
2427:
2424:
2423:
2421:
2419:
2415:
2412:
2410:
2406:
2390:
2387:
2385:
2382:
2381:
2380:
2379:
2376:
2373:
2372:
2370:
2368:
2364:
2358:
2355:
2354:
2352:
2350:
2346:
2340:
2337:
2335:
2332:
2330:
2326:
2322:
2319:
2318:
2316:
2314:
2310:
2307:
2305:
2301:
2291:
2288:
2283:
2282:
2281:
2280:
2275:
2272:
2271:
2270:
2269:
2263:
2260:
2257:
2254:
2253:
2252:
2251:
2248:
2245:
2244:
2239:
2236:
2235:
2234:
2233:
2230:
2228:
2225:
2224:
2222:
2220:
2216:
2210:
2207:
2203:
2200:
2198:
2195:
2193:
2190:
2188:
2185:
2184:
2183:
2182:
2179:
2177:
2174:
2173:
2172:
2168:
2166:
2162:
2159:
2157:
2153:
2147:
2144:
2142:
2139:
2138:
2127:
2126:Geneseo Shale
2123:
2120:
2118:
2115:
2113:
2110:
2109:
2108:
2107:
2102:
2101:
2100:
2098:
2097:Harrell Shale
2094:
2093:Genesee Group
2091:
2090:
2085:
2082:
2080:
2077:
2076:
2075:
2074:
2071:
2069:
2066:
2065:
2060:
2057:
2055:
2052:
2051:
2050:
2049:
2046:
2044:
2041:
2040:
2037:
2034:
2032:
2029:
2028:
2023:
2020:
2018:
2015:
2014:
2013:
2012:
2009:
2007:
2004:
2003:
2001:
1999:
1995:
1987:
1984:
1982:
1979:
1977:
1974:
1973:
1972:
1971:
1968:
1966:
1963:
1962:
1959:
1956:
1954:
1951:
1949:
1946:
1944:
1941:
1940:
1935:
1932:
1930:
1927:
1925:
1922:
1921:
1920:
1919:
1916:
1914:
1911:
1910:
1904:
1903:
1902:
1901:
1898:
1896:
1893:
1892:
1886:
1885:
1884:
1883:
1880:
1878:
1875:
1874:
1868:
1865:
1862:
1861:
1860:
1859:
1856:
1854:
1853:Venango Group
1851:
1850:
1847:
1844:
1842:
1841:Bedford Shale
1839:
1837:
1834:
1832:
1829:
1827:
1824:
1822:
1819:
1818:
1816:
1814:
1810:
1807:
1805:
1801:
1798:
1796:
1792:
1778:
1775:
1771:
1770:Bedford Shale
1768:
1766:
1763:
1761:
1760:Sunbury Shale
1758:
1755:
1752:
1751:
1750:
1749:
1746:
1744:
1741:
1740:
1737:
1734:
1733:
1731:
1729:
1725:
1719:
1715:
1712:
1711:
1709:
1707:
1703:
1695:"Little Lime"
1694:
1691:
1689:
1686:
1684:
1681:
1679:
1676:
1674:
1671:
1670:
1669:
1668:
1665:
1663:
1660:
1659:
1656:
1653:
1652:
1650:
1648:
1644:
1641:
1639:
1635:
1623:
1620:
1617:
1614:
1612:
1609:
1608:
1607:
1606:
1603:
1601:
1598:
1597:
1592:
1589:
1587:
1584:
1582:
1579:
1576:
1573:
1570:
1567:
1566:
1565:
1564:
1560:
1556:
1554:
1551:
1550:
1548:
1546:
1542:
1533:
1530:
1528:
1525:
1523:
1520:
1518:
1515:
1514:
1513:
1512:
1509:
1507:
1504:
1503:
1497:
1494:
1493:
1492:
1491:
1487:
1483:
1481:
1478:
1477:
1472:
1469:
1466:
1463:
1461:
1458:
1456:"No. 4a Coal"
1455:
1452:
1451:
1450:
1449:
1446:
1444:
1441:
1440:
1435:
1432:
1429:
1426:
1423:
1420:
1418:
1415:
1413:
1410:
1409:
1408:
1407:
1404:
1402:
1399:
1398:
1393:
1390:
1388:
1385:
1383:"No. 6a Coal"
1382:
1379:
1377:
1374:
1372:
1369:
1366:
1363:
1362:
1361:
1360:
1356:
1352:
1350:
1347:
1346:
1344:
1342:
1338:
1330:
1327:
1325:"No. 7a Coal"
1324:
1323:Mahoning Coal
1321:
1319:
1316:
1314:
1311:
1310:
1309:
1308:
1305:
1303:
1300:
1299:
1294:
1291:
1289:
1286:
1284:
1281:
1279:
1276:
1274:
1271:
1269:
1266:
1264:
1261:
1259:
1256:
1254:
1251:
1250:
1249:
1248:
1245:
1243:
1240:
1239:
1234:
1231:
1229:
1226:
1224:
1221:
1219:
1216:
1214:
1211:
1209:
1206:
1205:
1204:
1203:
1199:
1195:
1193:
1190:
1189:
1187:
1185:
1181:
1172:
1169:
1167:
1164:
1162:"No 8a. Coal"
1161:
1158:
1156:
1153:
1151:
1148:
1146:
1143:
1140:
1137:
1135:
1132:
1130:
1127:
1125:
1122:
1121:
1120:
1119:
1115:
1111:
1110:
1105:
1102:
1099:
1096:
1094:"No. 10 Coal"
1093:
1090:
1088:
1085:
1083:
1080:
1078:
1075:
1073:
1070:
1068:
1065:
1063:"No. 11 Coal"
1062:
1059:
1058:
1057:
1056:
1052:
1048:
1046:
1043:
1042:
1037:
1034:
1032:
1029:
1027:
1024:
1022:
1019:
1017:
1014:
1012:
1009:
1008:
1007:
1006:
1002:
998:
996:
995:Dunkard Group
993:
992:
990:
988:
984:
981:
979:
975:
972:
970:
966:
954:
951:
949:
946:
944:
941:
939:
936:
934:
931:
929:
926:
925:
924:
923:
919:
915:
914:
909:
906:
903:
901:
898:
896:
893:
891:
888:
886:
883:
881:
878:
876:
873:
871:
868:
866:
863:
861:
858:
856:
853:
851:
848:
846:
843:
842:
841:
840:
836:
832:
830:
829:Dunkard Group
827:
826:
824:
822:
818:
815:
813:
809:
806:
804:
798:
795:
793:
787:
783:
779:
772:
767:
765:
760:
758:
753:
752:
749:
721:
718:
716:
713:
712:
710:
708:
704:
698:
695:
693:
690:
689:
687:
685:
681:
675:
674:Shriver Chert
672:
670:
667:
665:
662:
660:
659:Mandata Shale
657:
655:
652:
651:
649:
647:
643:
640:
638:
634:
624:
621:
619:
616:
615:
613:
611:
607:
601:
598:
597:
595:
593:
589:
586:
584:
580:
570:
567:
565:
562:
560:
557:
555:
552:
550:
547:
546:
544:
542:
538:
532:
529:
527:
524:
523:
521:
519:
515:
512:
510:
506:
503:
501:
497:
483:
480:
478:
475:
474:
472:
470:
466:
460:
457:
455:
452:
451:
449:
447:
443:
437:
434:
432:
429:
428:
426:
424:
420:
417:
415:
411:
408:
406:
402:
399:
397:
391:
388:
386:
380:
376:
372:
365:
360:
358:
353:
351:
346:
345:
342:
333:
327:
325:
321:
315:
313:
309:
306:
301:
298:
291:
289:
287:
279:
277:
275:
274:Fulton County
271:
267:
259:
257:
255:
251:
247:
245:
240:
236:
232:
228:
220:
218:
216:
212:
206:
204:
203:Fulton County
196:
194:
192:
191:West Virginia
188:
184:
180:
176:
172:
168:
165:
155:
151:
148:
145:
141:
136:
133:
132:West Virginia
129:
125:
121:
118:
114:
111:United States
110:
106:
103:
100:
96:
91:
88:
85:
81:
76:
73:
70:
66:
63:
59:
56:
52:
48:
44:
41:
37:
33:
28:
19:
5642:Emsian Stage
5547:expanding it
5533:
4991:Sheinwoodian
4966:Salina Group
4935:Salina Group
4912:Salina Group
4798:
4762:
4503:Serpukhovian
3739:Sheinwoodian
3516:
3185:Serpukhovian
3100:Betsie Shale
2762:
2644:Medina Group
2554:Salina Group
2510:Salina Group
2479:Salina Group
2439:Salina Group
2324:
2289:
2122:Burket Shale
2068:Sonyea Group
1743:Pocono Group
1647:Serpukhovian
1618:"No. 1 Coal"
1577:"No. 2 Coal"
1534:"No. 3 Coal"
1467:"No. 4 Coal"
1454:Clarian Coal
1430:"No. 5 Coal"
1424:"No. 6 Coal"
1367:"No. 7 Coal"
1173:"No. 8 Coal"
1100:"Great Lime"
895:Tenmile Coal
885:Dunkard Coal
865:Nineveh Coal
782:Pennsylvania
663:
622:
564:Harrel Shale
423:Serpukhovian
300:
283:
272:in southern
270:Warfordsburg
263:
253:
242:
234:
230:
224:
207:
200:
179:Pennsylvania
173:is a mapped
170:
166:
161:
138:Type section
124:Pennsylvania
5291:Tremadocian
5230:Darriwilian
5160:Utica Shale
4679:Rhinestreet
4554:Tournaisian
3279:Tournaisian
2698:Utica Shale
1934:Huron Shale
1728:Tournaisian
1716:"Big Lime"
1616:Sharon Coal
469:Tournaisian
227:brachiopods
197:Description
49:sedimentary
5586:Categories
5424:Rome Group
5360:Knox Group
5304:Knox Group
5114:Hirnantian
5018:Llandovery
4904:Ludfordian
4832:Lochkovian
4641:Ohio Shale
4457:Bashkirian
4421:Kasimovian
4350:Cisuralian
3761:Llandovery
3647:Ludfordian
3555:Lochkovian
3130:Bashkirian
2610:Llandovery
2471:Ludfordian
2367:Lochkovian
2258:Moorehouse
1913:Ohio Shale
1545:Bashkirian
1184:Kasimovian
821:Cisuralian
707:Lochkovian
292:References
244:Viaphacops
239:trilobites
5539:formation
5479:Ediacaran
5343:Furongian
5251:Dapingian
5027:Telychian
4618:Famennian
4439:Moscovian
3770:Telychian
3346:Famennian
3092:Moscovian
2886:Furongian
2264:Edgecliff
1895:Elk Group
1813:Famennian
1341:Moscovian
518:Famennian
250:ostracods
143:Named for
78:Lithology
54:Underlies
5352:Stage 10
5170:Sandbian
5065:Aeronian
4958:Homerian
4927:Gorstian
4740:Eifelian
4717:Givetian
4656:Frasnian
4403:Gzhelian
4359:Asselian
3798:Aeronian
3716:Homerian
3675:Gorstian
3458:Eifelian
3435:Givetian
3389:Frasnian
3044:Virginia
2920:Series 2
2546:Homerian
2502:Gorstian
2219:Eifelian
2165:Givetian
1998:Frasnian
987:Gzhelian
610:Eifelian
592:Givetian
541:Frasnian
375:Maryland
286:Devonian
266:Needmore
246:cristata
187:Virginia
183:Maryland
177:unit in
164:Devonian
153:Named by
128:Virginia
120:Maryland
93:Location
68:Overlies
4949:Wenlock
4867:Pridoli
4814:Pragian
3707:Wenlock
3610:Pridoli
3527:Pragian
2929:Stage 4
2537:Wenlock
2418:Pridoli
2349:Pragian
684:Pragian
248:), and
221:Fossils
175:bedrock
108:Country
83:Primary
5221:Middle
5137:Katian
4895:Ludlow
4791:Emsian
4708:Middle
4536:Viséan
4283:Eocene
4006:Middle
3638:Ludlow
3504:Emsian
3426:Middle
3231:Viséan
2773:Middle
2462:Ludlow
2313:Emsian
2261:Nedrow
2255:Seneca
2156:Middle
1706:Viséan
646:Emsian
583:Middle
446:Viséan
189:, and
130:, and
116:Extent
98:Region
40:Emsian
5282:Lower
5105:Upper
4782:Lower
4609:Upper
4024:Lower
3838:Upper
3495:Lower
3337:Upper
2819:Lower
2680:Upper
2304:Lower
1804:Upper
637:Lower
509:Upper
87:shale
5543:stub
268:and
162:The
60:and
46:Type
4240:of
3042:of
780:of
373:of
280:Age
237:),
169:or
5588::
5452:pЄ
4331:Pz
4304:Mz
4273:Pe
4262:Cz
4251:Ph
4162:pЄ
3064:Pz
3053:Ph
2992:pЄ
2327:,
2323:,
2124:/
2095:/
802:Pz
791:Ph
395:Pz
384:Ph
323:^
311:^
288:.
233:,
193:.
185:,
181:,
126:,
122:,
38::
5574:e
5567:t
5560:v
5549:.
5470:Z
5461:♇
5334:Є
5096:O
4858:S
4600:D
4494:M
4394:⁋
4385:C
4341:P
4314:J
4230:e
4223:t
4216:v
4180:Z
4171:♇
4071:Є
3829:O
3601:S
3328:D
3176:M
3083:⁋
3074:C
3032:e
3025:t
3018:v
2877:Є
2797::
2671:O
2409:S
1795:D
1638:M
1561::
1488::
1357::
1200::
1116::
1053::
1003::
978:⁋
969:C
920::
837::
812:P
770:e
763:t
756:v
500:D
414:M
405:C
363:e
356:t
349:v
252:(
241:(
229:(
20:)
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