969:
1238:
1250:
601:
Formerly known by various names including the Lower
Carboniferous Sandstone, Basal Clastics and Calciferous Sandstone, the formation comprises about 300m thickness of red sandstones and quartz conglomerates. Though much obscured by superficial deposits, its outcrop extends from the countryside north
487:
Known variously in the past as the Middle or Calp
Limestone, or Lower and Middle Calp Shales, this 80-450m thickness of dark grey mudstones with layers of bioclastic limestone includes at its base, the Skea Sandstone Member (a.k.a. the Dowra Sandstone Member). Its outcrop extends from northeast of
450:
Variously known in the past as the Middle or Calp
Sandstone, Upper Calp (Macnean) Sandstone and Clonelly Sandstone Group, about 200m thickness of brown to grey sandstones interbedded with mudstones and siltstones make up this formation. A thin band extends southwest and northeast from
409:
Known previously as the lower part of the Middle or Calp
Limestone and of the Upper Calp Shale, this 60-120m thickness of mudstones with fossil-rich grey limestones and thin calciturbidites and sandstones make up the formation. The outcrop runs from north of
520:
Formerly known as the
Pettigo Limestone Group or the Lower Limestone, this 120-450m thickness of blue-grey limestones with interbeds of silty shale, includes the Gortnaree Sandstone Member at its base. It outcrops in the country between
459:
whilst a broader band is found east of Lough
Macnean Lower, running north to Derrygonnelly. A narrow outcrop runs northeast-southwest through Manorhamilton. The most extensive area is around
377:
which was formerly referred to as the upper part of the Middle or Calp
Limestone is a 100-180m thickness of grey limestone with interbedded shale and mudstone) Its outcrop runs from west of
889:
1290:
859:
561:. There are further outcrops around Sligo Bay and southwest from Manorhamilton. In the Irish Republic, this rock sequence is known as the Oakport Limestone Formation.
512:
whilst another band runs southwest from
Manorhamilton. Occurrences of this rock further south in the Republic of Ireland are known as the Lisgorman Shale Formation.
1222:
74:
Dartry
Limestone, Glencar Limestone, Benbulben Shale, Mullaghmore Sandstone, Bundoran Shale, Ballyshannon Limestone, Clogher Valley and Ballyness formations
836:
Geology of the country around
Derrygonnelly and Marble Arch, Memoir of the Geological Survey of Northern Ireland, Sheet 44, 56 and 43 (Northern Ireland)
882:
496:
to north of Derrygonnelly. There are broken outcrops around the northern shore of Lower Lough Erne and from the west end of the lough to the coast at
1275:
1285:
875:
1186:
537:
to Upper Lough Erne and then through Enniskillen and the western edge of the lough as far as Church Hill. It also occurs in the
1088:
1050:
843:
1201:
1280:
1166:
988:
574:
603:
550:
530:
642:
Geological Survey of Northern Ireland 1991, 1:50,000 scale geological map sheet NI 44,56 and 43 ‘’Derrygonelly’’
928:
1254:
586:
64:
538:
386:
129:
464:
1040:
209:
194:
54:
1156:
948:
280:
268:
248:
92:
295:
is a significant landscape-forming rock unit dating from the Asbian substage. It is dark grey and
853:
320:
348:
Cloghan Hill Limestone (30-50m thick, mud mounds amidst shales, silts and limestones, includes
35:
839:
374:
252:
1151:
1143:
1108:
1078:
1060:
943:
902:
492:, though is largely covered by more recent deposits. A band of these shales extends west of
489:
415:
394:
312:
292:
256:
240:
216:
202:
162:
152:
1098:
570:
456:
390:
366:
In the Irish Republic, this rock sequence is known as the Bricklieve Limestone Formation.
968:
1242:
1123:
1103:
1093:
1027:
1023:
1008:
1003:
958:
593:
and along the northeast edge of Enniskillen to the eastern shores of Lower Lough Erne.
558:
419:
263:, above which are the layered sandstones and shales of the Meenymore Formation of the
1269:
1191:
1176:
1118:
1013:
980:
918:
778:
750:
736:
708:
680:
666:
652:
630:
526:
439:
431:
423:
382:
264:
236:
213:
181:
166:
82:
43:
31:
820:
806:
792:
764:
722:
694:
1237:
1206:
1181:
1113:
953:
611:
582:
533:. A further outcrop extends from north of Monaghan west then along the border from
476:
472:
460:
427:
316:
296:
260:
244:
231:
which accumulated to a thickness of 2400m in the northwest Carboniferous basin of
569:
The formation which comprises peritidal limestones and shales is evident in the
1171:
1128:
1083:
1073:
1045:
501:
493:
468:
17:
1068:
993:
923:
867:
426:
area. From beneath the Cliffs of Magho, the outcrop wraps around the south of
378:
338:
331:
471:. A further band wraps south towards Sligo. There are other outcrops west of
1035:
910:
590:
554:
509:
452:
398:
342:
319:. Up to 350m thick, it is subdivided with several distinct ‘rock units’ or ‘
308:
228:
220:
125:
115:
1161:
1133:
933:
546:
542:
505:
497:
411:
133:
606:
southwestwards towards Clogher and in the area between Fivemiletown and
998:
898:
607:
578:
534:
435:
359:
352:
232:
198:
522:
358:
Knockmore Limestone (between 0-290m thick, lenticular mounds of grey
300:
267:. The succession continues south and west across the border into the
206:
39:
279:
In stratigraphic order (youngest/uppermost at top), its constituent
938:
349:
304:
224:
137:
834:
I.C. Legg, T.P Johnston, W.I. Mitchell & R.A. Smith (1998).
871:
838:(1. ed.). London: The Stationery Office. pp. 6–25.
553:. It is widespread east of Donegal Bay in the country around
479:
from Lough Bradan Forest to the shores of Lower Lough Erne.
545:
then northwest to Slieve Glass then west and southwest to
541:
and Ederney areas and in a broken curved outcrop towards
235:. The type areas for the group are the Clogher Valley of
610:. A further outcrop extends northwest from Lisbellaw to
422:. West of the lough, a broad outcrop runs north to the
1215:
1142:
1059:
1022:
979:
909:
247:on older rocks of the Shanmullagh Formation of the
197:coined to refer to a particular succession of rock
177:
172:
158:
148:
143:
121:
111:
106:
98:
88:
78:
70:
60:
50:
25:
821:"BGS Lexicon of Named Rock Units - Result Details"
807:"BGS Lexicon of Named Rock Units - Result Details"
793:"BGS Lexicon of Named Rock Units - Result Details"
779:"BGS Lexicon of Named Rock Units - Result Details"
765:"BGS Lexicon of Named Rock Units - Result Details"
751:"BGS Lexicon of Named Rock Units - Result Details"
737:"BGS Lexicon of Named Rock Units - Result Details"
723:"BGS Lexicon of Named Rock Units - Result Details"
709:"BGS Lexicon of Named Rock Units - Result Details"
695:"BGS Lexicon of Named Rock Units - Result Details"
681:"BGS Lexicon of Named Rock Units - Result Details"
667:"BGS Lexicon of Named Rock Units - Result Details"
653:"BGS Lexicon of Named Rock Units - Result Details"
631:https://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=TYRO
585:area. The outcrop also extends southwest from the
323:’ recognised. In stratigraphic order, these are:
251:which are the local representatives of the Lower
291:Traditionally known as the Upper Limestone, the
271:, though different names are typically applied.
883:
500:and further outcrops around the northeast of
8:
858:: CS1 maint: multiple names: authors list (
614:and the eastern shores of Lower Lough Erne.
549:and the north shore of Lower Lough Erne to
330:Cloghany Limestone (a bioclastic crinoidal
890:
876:
868:
22:
337:Carrickmacsparrow Limestone (a crinoidal
307:nodules or beds. The type area is in the
967:
259:, the uppermost part of the group, is a
1291:Geological groups of the United Kingdom
623:
239:and the Fermanagh Highlands of nearby
851:
504:. There are more further west between
434:. There are further outcrops north of
1223:Geological faults of Northern Ireland
7:
345:, fawn in colour, from 4-11m thick)
972:Basalt columns at Giant's Causeway
65:Carboniferous Limestone Supergroup
14:
397:. It is also found widely around
275:Constituent geological formations
1248:
1236:
516:Ballyshannon Limestone Formation
633:BGS Lexicon of named rock units
446:Mullaghmore Sandstone Formation
1276:Carboniferous System of Europe
1:
243:. The rocks of the group sit
1202:Ulster White Limestone Group
529:and in a small area east of
334:between 0.5 and 1.25m thick)
299:in nature and includes some
1286:Geology of Northern Ireland
1255:Northern Ireland portal
370:Glencar Limestone Formation
219:. It comprises a series of
1307:
1167:Hibernian Greensands Group
438:and running NE-SW through
287:Dartry Limestone Formation
15:
1231:
965:
405:Benbulben Shale Formation
195:lithostratigraphical term
30:
565:Clogher Valley Formation
483:Bundoran Shale Formation
16:Not to be confused with
973:
573:area and extends from
488:Monaghan southwest to
971:
1157:Benaughlin Mountain
597:Ballyness Formation
383:Lough Macnean Lower
269:Republic of Ireland
32:Stratigraphic range
1281:Geology of Ireland
1243:Geology portal
974:
430:generally west to
1263:
1262:
1187:Marble Arch Caves
589:area to south of
255:. The top of the
253:Old Red Sandstone
187:
186:
1298:
1253:
1252:
1251:
1241:
1240:
1152:Belmore Mountain
1109:Slieve Commedagh
1079:Mourne Mountains
949:Giant's Causeway
903:Northern Ireland
892:
885:
878:
869:
863:
857:
849:
825:
824:
817:
811:
810:
803:
797:
796:
789:
783:
782:
775:
769:
768:
761:
755:
754:
747:
741:
740:
733:
727:
726:
719:
713:
712:
705:
699:
698:
691:
685:
684:
677:
671:
670:
663:
657:
656:
649:
643:
640:
634:
628:
490:Upper Lough Erne
465:Mullaghmore Head
416:Upper Lough Erne
395:Lower Lough Erne
313:Dartry Mountains
293:Dartry Limestone
257:Dartry Limestone
241:County Fermanagh
203:Northern Ireland
163:County Fermanagh
153:Northern Ireland
23:
1306:
1305:
1301:
1300:
1299:
1297:
1296:
1295:
1266:
1265:
1264:
1259:
1249:
1247:
1235:
1227:
1211:
1138:
1099:Slieve Bearnagh
1055:
1041:Ring of Gullion
1018:
975:
963:
905:
896:
866:
850:
846:
833:
829:
828:
819:
818:
814:
805:
804:
800:
791:
790:
786:
777:
776:
772:
763:
762:
758:
749:
748:
744:
735:
734:
730:
721:
720:
716:
707:
706:
702:
693:
692:
688:
679:
678:
674:
665:
664:
660:
651:
650:
646:
641:
637:
629:
625:
620:
599:
571:Castlecaulfield
567:
518:
485:
457:County Monaghan
448:
407:
391:Cliffs of Magho
372:
309:Benbulben Range
289:
277:
201:which occur in
21:
12:
11:
5:
1304:
1302:
1294:
1293:
1288:
1283:
1278:
1268:
1267:
1261:
1260:
1258:
1257:
1245:
1232:
1229:
1228:
1226:
1225:
1219:
1217:
1213:
1212:
1210:
1209:
1204:
1199:
1194:
1189:
1184:
1179:
1174:
1169:
1164:
1159:
1154:
1148:
1146:
1140:
1139:
1137:
1136:
1131:
1126:
1124:Slieve Gallion
1121:
1116:
1111:
1106:
1104:Slieve Binnian
1101:
1096:
1094:Sawel Mountain
1091:
1086:
1081:
1076:
1071:
1065:
1063:
1057:
1056:
1054:
1053:
1048:
1043:
1038:
1032:
1030:
1020:
1019:
1017:
1016:
1011:
1009:Slieve Gullion
1006:
1004:Slieve Gallion
1001:
996:
991:
989:Carrick a Rede
985:
983:
981:Volcanic plugs
977:
976:
966:
964:
962:
961:
959:Rathlin Island
956:
951:
946:
941:
936:
931:
929:Black Mountain
926:
921:
919:Antrim plateau
915:
913:
907:
906:
897:
895:
894:
887:
880:
872:
865:
864:
844:
830:
827:
826:
812:
798:
784:
770:
756:
742:
728:
714:
700:
686:
672:
658:
644:
635:
622:
621:
619:
616:
598:
595:
566:
563:
517:
514:
484:
481:
467:and including
447:
444:
420:Maguiresbridge
418:then north to
406:
403:
375:This formation
371:
368:
364:
363:
356:
346:
335:
328:
327:Carn Limestone
288:
285:
276:
273:
185:
184:
179:
175:
174:
170:
169:
160:
156:
155:
150:
146:
145:
141:
140:
123:
119:
118:
113:
109:
108:
104:
103:
100:
96:
95:
90:
86:
85:
80:
76:
75:
72:
68:
67:
62:
58:
57:
52:
48:
47:
28:
27:
13:
10:
9:
6:
4:
3:
2:
1303:
1292:
1289:
1287:
1284:
1282:
1279:
1277:
1274:
1273:
1271:
1256:
1246:
1244:
1239:
1234:
1233:
1230:
1224:
1221:
1220:
1218:
1214:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1192:Slieve Rushen
1190:
1188:
1185:
1183:
1180:
1178:
1177:Leitrim Group
1175:
1173:
1170:
1168:
1165:
1163:
1160:
1158:
1155:
1153:
1150:
1149:
1147:
1145:
1141:
1135:
1132:
1130:
1127:
1125:
1122:
1120:
1119:Slieve Donard
1117:
1115:
1112:
1110:
1107:
1105:
1102:
1100:
1097:
1095:
1092:
1090:
1087:
1085:
1082:
1080:
1077:
1075:
1072:
1070:
1067:
1066:
1064:
1062:
1058:
1052:
1049:
1047:
1044:
1042:
1039:
1037:
1034:
1033:
1031:
1029:
1025:
1021:
1015:
1014:Tievebulliagh
1012:
1010:
1007:
1005:
1002:
1000:
997:
995:
992:
990:
987:
986:
984:
982:
978:
970:
960:
957:
955:
952:
950:
947:
945:
944:Donald's Hill
942:
940:
937:
935:
932:
930:
927:
925:
922:
920:
917:
916:
914:
912:
908:
904:
900:
893:
888:
886:
881:
879:
874:
873:
870:
861:
855:
847:
841:
837:
832:
831:
822:
816:
813:
808:
802:
799:
794:
788:
785:
780:
774:
771:
766:
760:
757:
752:
746:
743:
738:
732:
729:
724:
718:
715:
710:
704:
701:
696:
690:
687:
682:
676:
673:
668:
662:
659:
654:
648:
645:
639:
636:
632:
627:
624:
617:
615:
613:
609:
605:
596:
594:
592:
588:
584:
580:
576:
572:
564:
562:
560:
556:
552:
548:
544:
540:
536:
532:
528:
527:Brookeborough
524:
515:
513:
511:
507:
503:
499:
495:
491:
482:
480:
478:
474:
470:
466:
462:
458:
454:
445:
443:
441:
440:Manorhamilton
437:
433:
432:Glencar Lough
429:
425:
424:Derrygonnelly
421:
417:
413:
404:
402:
401:to the west.
400:
396:
392:
388:
384:
380:
376:
369:
367:
361:
357:
354:
351:
347:
344:
340:
336:
333:
329:
326:
325:
324:
322:
318:
314:
310:
306:
302:
298:
294:
286:
284:
282:
274:
272:
270:
266:
265:Leitrim Group
262:
261:disconformity
258:
254:
250:
249:Fintona Group
246:
245:unconformably
242:
238:
237:County Tyrone
234:
230:
226:
222:
218:
215:
214:Carboniferous
211:
208:
204:
200:
196:
192:
183:
182:County Tyrone
180:
176:
171:
168:
167:County Tyrone
164:
161:
157:
154:
151:
147:
142:
139:
135:
131:
130:conglomerates
127:
124:
120:
117:
114:
110:
105:
101:
97:
94:
93:Fintona Group
91:
87:
84:
83:Leitrim Group
81:
77:
73:
69:
66:
63:
59:
56:
53:
49:
45:
44:Carboniferous
41:
37:
33:
29:
24:
19:
1207:Waterloo Bay
1197:Tyrone Group
1196:
1182:Magheramorne
1114:Slieve Croob
1051:The Skerries
954:Murlough Bay
835:
815:
801:
787:
773:
759:
745:
731:
717:
703:
689:
675:
661:
647:
638:
626:
612:Ballycassidy
600:
583:Fivemiletown
568:
557:and east of
519:
486:
477:Mountcharles
473:Ballyshannon
461:Lough Melvin
449:
428:Lough Melvin
408:
393:overlooking
373:
365:
317:County Sligo
297:argillaceous
290:
278:
191:Tyrone Group
190:
188:
173:Type section
26:Tyrone Group
1172:Islandmagee
1144:Sedimentary
1129:Slieve Muck
1089:Mullaghmore
1084:Mullaghcarn
1074:Loughermore
1061:Metamorphic
1046:The Maidens
575:Ballygawley
502:Donegal Bay
494:Enniskillen
469:Inishmurray
205:within the
18:The Tyrones
1270:Categories
1069:Benbradagh
994:Scawt Hill
924:Benevenagh
845:0118845314
618:References
531:Aughnacloy
379:Swanlinbar
339:biosparite
332:grainstone
281:formations
229:sandstones
221:limestones
116:limestones
1036:Fair Head
911:Volcanism
854:cite book
591:Lisbellaw
555:Ballintra
510:Drumcliff
475:, around
453:Scotstown
399:Sligo Bay
385:then via
343:packstone
178:Named for
126:sandstone
107:Lithology
99:Thickness
79:Underlies
71:Sub-units
36:Courceyan
1162:Cuilcagh
1134:Sperrins
934:Cavehill
604:Donamore
577:through
547:Pettigoe
543:Drumquin
506:Kinlough
498:Bundoran
463:west to
414:towards
412:Monaghan
360:micrites
353:bioherms
144:Location
134:mudstone
89:Overlies
999:Slemish
899:Geology
608:Fintona
581:to the
579:Clogher
559:Donegal
551:Belleek
535:Rosslea
436:Ederney
389:to the
321:members
301:fossils
233:Ireland
212:of the
149:Country
112:Primary
61:Unit of
842:
523:Clabby
225:shales
217:Period
207:Visean
199:strata
159:Extent
102:~2400m
40:Asbian
1216:Lists
1028:sills
1024:Dykes
939:Divis
587:Tempo
350:coral
305:chert
283:are:
210:Stage
193:is a
138:shale
122:Other
55:Group
1026:and
860:link
840:ISBN
539:Kesh
525:and
508:and
387:Boho
311:and
303:and
227:and
189:The
51:Type
901:of
602:of
455:in
381:to
341:or
315:of
38:to
1272::
856:}}
852:{{
442:.
223:,
165:,
136:,
132:,
128:,
42:–
34::
891:e
884:t
877:v
862:)
848:.
823:.
809:.
795:.
781:.
767:.
753:.
739:.
725:.
711:.
697:.
683:.
669:.
655:.
362:)
355:)
46:)
20:.
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