Knowledge

Petrology

Source 📝

418: 36: 878: 1480: 1027: 404: 1492: 1112: 1504: 101: 234: 361:) which have undergone chemical, mineralogical or textural changes due to the effects of pressure, temperature, or both). The original rock, prior to change (called the protolith), may be of any sort. 379:
that rarely survive the journey to the surface in pristine condition. They are also one of the prime sources of information about completely inaccessible rocks, such as those in the Earth's
210:, but in current usage, lithology focuses on macroscopic hand-sample or outcrop-scale description of rocks while petrography is the speciality that deals with microscopic details. 743: 65: 811: 221:, is the graphic representation of geological formations being drilled through and drawn on a log called a mud log. As the cuttings are circulated out of the 852: 371:
of natural or synthetic materials at elevated pressures and temperatures. Experiments are particularly useful for investigating rocks of the lower
391:. The work of experimental petrologists has laid a foundation on which modern understanding of igneous and metamorphic processes has been built. 719: 683: 665: 628: 597: 541: 494: 469: 837: 758: 334:
which consist of pieces or particles derived from other rocks or biological or chemical deposits, and are usually bound together in a
1063: 804: 646: 576: 87: 775: 171:, their mineralogy, composition, texture, structure and the conditions under which they form. Petrology has three subdivisions: 847: 857: 1540: 797: 762: 1134: 252:, and chemical analysis to describe the composition and texture of rocks. Petrologists also include the principles of 131: 1535: 657: 620: 609: 515: 113: 1101: 862: 109: 48: 148: 58: 52: 44: 584: 237: 364: 124: 69: 1397: 1056: 563: 423: 767: 974: 931: 842: 568: 376: 1458: 1422: 1392: 1139: 1091: 784: 780: 638: 384: 225:, they are sampled, examined (typically under a 10× microscope) and tested chemically when needed. 1530: 1412: 1351: 1303: 1229: 1190: 1121: 1096: 1086: 989: 737: 249: 214: 183:. Igneous and metamorphic petrology are commonly taught together because both make heavy use of 187:, chemical methods, and phase diagrams. Sedimentary petrology is commonly taught together with 1508: 1402: 1356: 1318: 1002: 979: 911: 725: 715: 697: 679: 675: 661: 642: 624: 593: 572: 537: 490: 465: 288: 172: 27:
Branch of geology that studies the formation, composition, distribution and structure of rocks
1496: 1417: 1387: 1313: 1298: 1208: 1049: 867: 342: 335: 319: 192: 176: 1437: 1239: 1213: 1160: 964: 954: 372: 877: 233: 1484: 1432: 1366: 1328: 1323: 1275: 1155: 1031: 959: 921: 901: 896: 689: 409: 368: 312: 168: 367:
employs high-pressure, high-temperature apparatus to investigate the geochemistry and
1524: 1463: 1244: 1180: 1129: 946: 906: 589: 308: 261: 180: 17: 789: 1479: 1346: 1270: 1203: 1198: 1165: 1111: 1026: 1012: 936: 829: 705: 403: 380: 292: 253: 188: 105: 272:
There are three branches of petrology, corresponding to the three types of rocks:
1427: 1293: 1249: 1234: 281: 277: 218: 207: 112:
seen under the microscope, with plane-polarized light in the upper picture, and
1407: 1382: 1361: 1338: 1265: 1170: 969: 926: 916: 729: 399: 257: 245: 1453: 1308: 331: 323: 203: 184: 709: 771: 436: 264:
data and experiments in order to better understand the origins of rocks.
222: 1285: 1072: 1007: 997: 820: 296: 273: 164: 635:
Mantle Petrology: field observations and high-pressure experimentation
195:. Modern sedimentary petrology is making increasing use of chemistry. 358: 354: 350: 300: 154: 137: 100: 633:
Fei, Yingwei; Bertka, Constance M.; Mysen, Bjorn O. (eds.) (1999),
346: 327: 304: 260:
through the study of geochemical trends and cycles and the use of
232: 156: 99: 617:
Gems, Granites, and Gravels: knowing and using rocks and minerals
388: 341:
Metamorphic petrology focuses on the composition and texture of
318:
Sedimentary petrology focuses on the composition and texture of
240:(1906–1988), first female professor of petrography in Yugoslavia 1045: 793: 783:- Center for International Earth Science Information Network, 759:
Atlas of Igneous and metamorphic rocks, minerals, and textures
431: 29: 876: 536:(2nd ed.). New York: Prentice Hall. pp. 467–468. 1041: 485:
Blatt, Harvey; Tracy, Robert J.; Owens, Brent E. (2006).
462:
The 22nd edition of the Manual of mineral science. Buch
582:
Blatt, Harvey; Tracy, Robert J.; Owens, Brent (2005),
116:
light in the lower picture. Scale box is 0.25 mm.
615:
Dietrich, Richard Vincent; Skinner, Brian J. (2009),
774:) – Department of Earth and Environmental Sciences, 284:, and another dealing with experimental techniques: 1446: 1375: 1337: 1284: 1258: 1222: 1189: 1148: 1120: 1079: 988: 945: 887: 828: 781:Petrological Database of the Ocean Floor (PetDB) 585:Petrology: igneous, sedimentary, and metamorphic 57:but its sources remain unclear because it lacks 654:Principles of Igneous and Metamorphic Petrology 534:Principles of igneous and metamorphic petrology 512:Essentials of Igneous and Metamorphic Petrology 487:Petrology: igneous, sedimentary and metamorphic 191:because it deals with the processes that form 1057: 805: 8: 303:which have crystallized from molten rock or 1064: 1050: 1042: 812: 798: 790: 742:: CS1 maint: location missing publisher ( 291:focuses on the composition and texture of 88:Learn how and when to remove this message 853:Principle of cross-cutting relationships 711:An introduction to metamorphic petrology 453: 206:was once approximately synonymous with 863:Principle of inclusions and components 735: 652:Philpotts, Anthony; Ague, Jay (2009), 672:Introduction to Ore-Forming Processes 7: 527: 525: 464:. New York: Wiley. 2002. p. 1. 1503: 838:Principle of original horizontality 510:Frost, B. R.; Frost, C. D. (2014). 489:(3rd ed.). New York: Freeman. 163: 'study of') is the branch of 217:, lithology, or more specifically 25: 564:Igneous and Metamorphic Petrology 244:Petrology utilizes the fields of 1502: 1491: 1490: 1478: 1110: 1025: 776:Rensselaer Polytechnic Institute 416: 402: 383:and in the mantles of the other 34: 848:Principle of lateral continuity 858:Principle of faunal succession 768:Metamorphic Petrology Database 606:Petrology of Sedimentary Rocks 1: 763:University of North Carolina 1135:Geological history of Earth 1557: 1108: 658:Cambridge University Press 621:Cambridge University Press 610:Cambridge University Press 516:Cambridge University Press 147: 130: 1472: 1149:Composition and structure 1102:Index of geology articles 1021: 874: 714:(2 ed.). Cambridge. 307:). Igneous rocks include 144: 'rock' and 947:Geomorphologic processes 830:Stratigraphic principles 823:principles and processes 532:Winter, John D. (2010). 43:This article includes a 561:Best, Myron G. (2002), 238:Ljudmila Dolar Mantuani 72:more precise citations. 1013:Mass wasting processes 881: 761:– Geology Department, 604:Boggs, S. Jr. (2009), 365:Experimental petrology 241: 117: 1398:Environmental geology 889:Petrologic principles 880: 694:Sedimentary Petrology 424:Earth sciences portal 236: 181:sedimentary petrology 103: 18:Metamorphic petrology 1541:Oilfield terminology 1357:Planetary geophysics 975:Marine transgression 843:Law of superposition 569:Blackwell Publishing 1459:Petroleum geologist 1423:Forensic geophysics 1393:Engineering geology 1140:Timeline of geology 1092:Glossary of geology 785:Columbia University 704:Yardley, B. W. D.; 639:Geochemical Society 385:terrestrial planets 338:of finer material). 1485:Geology portal 1413:Geologic modelling 1352:Geophysical survey 1304:Geodetic astronomy 1230:Structural geology 1191:Historical geology 1122:History of geology 1097:History of geology 1087:Outline of geology 1032:Geology portal 990:Sediment transport 882: 250:optical mineralogy 242: 215:petroleum industry 118: 45:list of references 1536:Petroleum geology 1518: 1517: 1403:Planetary geology 1319:Planetary geodesy 1039: 1038: 1008:Glacial processes 1003:Aeolian processes 998:Fluvial processes 980:Marine regression 721:978-1-108-65955-0 698:Blackwell Science 684:978-0-632-06378-9 676:Blackwell Science 670:Robb, L. (2005). 666:978-0-521-88006-0 629:978-0-521-10722-8 598:978-0-7167-3743-8 543:978-0-321-59257-6 496:978-0-7167-3743-8 471:978-0-471-25177-4 343:metamorphic rocks 320:sedimentary rocks 289:Igneous petrology 98: 97: 90: 16:(Redirected from 1548: 1506: 1505: 1494: 1493: 1483: 1482: 1418:Forensic geology 1388:Economic geology 1314:Gravity of Earth 1209:Paleoclimatology 1114: 1066: 1059: 1052: 1043: 1030: 1029: 814: 807: 800: 791: 747: 741: 733: 700: 612: 548: 547: 529: 520: 519: 507: 501: 500: 482: 476: 475: 458: 426: 421: 420: 419: 412: 407: 406: 193:sedimentary rock 160: 151: 141: 134: 93: 86: 82: 79: 73: 68:this article by 59:inline citations 38: 37: 30: 21: 1556: 1555: 1551: 1550: 1549: 1547: 1546: 1545: 1521: 1520: 1519: 1514: 1477: 1468: 1442: 1438:Mineral physics 1371: 1333: 1280: 1254: 1240:Plate tectonics 1218: 1214:Palaeogeography 1185: 1161:Crystallography 1144: 1116: 1115: 1106: 1075: 1070: 1040: 1035: 1024: 1017: 984: 965:Tectonic uplift 955:Plate tectonics 941: 883: 872: 824: 818: 755: 750: 734: 722: 703: 688: 603: 557: 552: 551: 544: 531: 530: 523: 509: 508: 504: 497: 484: 483: 479: 472: 460: 459: 455: 450: 445: 422: 417: 415: 408: 401: 398: 369:phase relations 345:(rocks such as 322:(rocks such as 295:(rocks such as 270: 248:, petrography, 231: 201: 114:cross-polarized 94: 83: 77: 74: 63: 49:related reading 39: 35: 28: 23: 22: 15: 12: 11: 5: 1554: 1552: 1544: 1543: 1538: 1533: 1523: 1522: 1516: 1515: 1513: 1512: 1500: 1488: 1473: 1470: 1469: 1467: 1466: 1461: 1456: 1450: 1448: 1444: 1443: 1441: 1440: 1435: 1433:Mining geology 1430: 1425: 1420: 1415: 1410: 1405: 1400: 1395: 1390: 1385: 1379: 1377: 1373: 1372: 1370: 1369: 1367:Tectonophysics 1364: 1359: 1354: 1349: 1343: 1341: 1335: 1334: 1332: 1331: 1329:Geopositioning 1326: 1324:Remote sensing 1321: 1316: 1311: 1306: 1301: 1296: 1290: 1288: 1282: 1281: 1279: 1278: 1276:Marine geology 1273: 1268: 1262: 1260: 1256: 1255: 1253: 1252: 1247: 1242: 1237: 1232: 1226: 1224: 1220: 1219: 1217: 1216: 1211: 1206: 1201: 1195: 1193: 1187: 1186: 1184: 1183: 1178: 1173: 1168: 1163: 1158: 1156:Cosmochemistry 1152: 1150: 1146: 1145: 1143: 1142: 1137: 1132: 1126: 1124: 1118: 1117: 1109: 1107: 1105: 1104: 1099: 1094: 1089: 1083: 1081: 1077: 1076: 1071: 1069: 1068: 1061: 1054: 1046: 1037: 1036: 1022: 1019: 1018: 1016: 1015: 1010: 1005: 1000: 994: 992: 986: 985: 983: 982: 977: 972: 967: 962: 960:Salt tectonics 957: 951: 949: 943: 942: 940: 939: 934: 929: 924: 922:Soil formation 919: 914: 909: 904: 899: 893: 891: 885: 884: 875: 873: 871: 870: 865: 860: 855: 850: 845: 840: 834: 832: 826: 825: 819: 817: 816: 809: 802: 794: 788: 787: 778: 765: 754: 753:External links 751: 749: 748: 720: 701: 686: 668: 650: 631: 613: 601: 580: 558: 556: 553: 550: 549: 542: 521: 502: 495: 477: 470: 452: 451: 449: 446: 444: 441: 440: 439: 434: 428: 427: 413: 410:Geology portal 397: 394: 393: 392: 362: 339: 316: 313:plutonic rocks 269: 266: 230: 227: 200: 197: 108:of a volcanic 96: 95: 53:external links 42: 40: 33: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1553: 1542: 1539: 1537: 1534: 1532: 1529: 1528: 1526: 1511: 1510: 1501: 1499: 1498: 1489: 1487: 1486: 1481: 1475: 1474: 1471: 1465: 1464:Volcanologist 1462: 1460: 1457: 1455: 1452: 1451: 1449: 1445: 1439: 1436: 1434: 1431: 1429: 1426: 1424: 1421: 1419: 1416: 1414: 1411: 1409: 1406: 1404: 1401: 1399: 1396: 1394: 1391: 1389: 1386: 1384: 1381: 1380: 1378: 1374: 1368: 1365: 1363: 1360: 1358: 1355: 1353: 1350: 1348: 1345: 1344: 1342: 1340: 1336: 1330: 1327: 1325: 1322: 1320: 1317: 1315: 1312: 1310: 1307: 1305: 1302: 1300: 1299:Earth's orbit 1297: 1295: 1292: 1291: 1289: 1287: 1283: 1277: 1274: 1272: 1269: 1267: 1264: 1263: 1261: 1257: 1251: 1248: 1246: 1245:Geomorphology 1243: 1241: 1238: 1236: 1233: 1231: 1228: 1227: 1225: 1223:Dynamic Earth 1221: 1215: 1212: 1210: 1207: 1205: 1202: 1200: 1197: 1196: 1194: 1192: 1188: 1182: 1181:Sedimentology 1179: 1177: 1174: 1172: 1169: 1167: 1164: 1162: 1159: 1157: 1154: 1153: 1151: 1147: 1141: 1138: 1136: 1133: 1131: 1130:Geochronology 1128: 1127: 1125: 1123: 1119: 1113: 1103: 1100: 1098: 1095: 1093: 1090: 1088: 1085: 1084: 1082: 1078: 1074: 1067: 1062: 1060: 1055: 1053: 1048: 1047: 1044: 1034: 1033: 1028: 1020: 1014: 1011: 1009: 1006: 1004: 1001: 999: 996: 995: 993: 991: 987: 981: 978: 976: 973: 971: 968: 966: 963: 961: 958: 956: 953: 952: 950: 948: 944: 938: 935: 933: 930: 928: 925: 923: 920: 918: 915: 913: 910: 908: 905: 903: 900: 898: 895: 894: 892: 890: 886: 879: 869: 868:Walther's law 866: 864: 861: 859: 856: 854: 851: 849: 846: 844: 841: 839: 836: 835: 833: 831: 827: 822: 815: 810: 808: 803: 801: 796: 795: 792: 786: 782: 779: 777: 773: 769: 766: 764: 760: 757: 756: 752: 745: 739: 731: 727: 723: 717: 713: 712: 707: 706:Warren, Clare 702: 699: 695: 691: 690:Tucker, M. E. 687: 685: 681: 677: 673: 669: 667: 663: 659: 655: 651: 648: 647:0-941809-05-6 644: 640: 637:(Houston TX: 636: 632: 630: 626: 622: 618: 614: 611: 607: 602: 599: 595: 591: 590:W. H. Freeman 587: 586: 581: 578: 577:1-4051-0588-7 574: 570: 566: 565: 560: 559: 554: 545: 539: 535: 528: 526: 522: 517: 513: 506: 503: 498: 492: 488: 481: 478: 473: 467: 463: 457: 454: 447: 442: 438: 435: 433: 430: 429: 425: 414: 411: 405: 400: 395: 390: 386: 382: 378: 374: 370: 366: 363: 360: 356: 352: 348: 344: 340: 337: 333: 329: 325: 321: 317: 314: 310: 306: 302: 298: 294: 293:igneous rocks 290: 287: 286: 285: 283: 279: 275: 267: 265: 263: 262:thermodynamic 259: 255: 251: 247: 239: 235: 228: 226: 224: 220: 216: 211: 209: 205: 198: 196: 194: 190: 186: 182: 178: 174: 170: 167:that studies 166: 162: 159: 158: 150: 146: 143: 140: 133: 129: 126: 125:Ancient Greek 122: 115: 111: 107: 102: 92: 89: 81: 78:December 2008 71: 67: 61: 60: 54: 50: 46: 41: 32: 31: 19: 1507: 1495: 1476: 1376:Applications 1347:Geomagnetism 1271:Hydrogeology 1204:Paleontology 1199:Stratigraphy 1175: 1166:Geochemistry 1023: 937:Metamorphism 888: 710: 693: 671: 653: 634: 616: 605: 583: 562: 533: 511: 505: 486: 480: 461: 456: 381:lower mantle 377:upper mantle 271: 254:geochemistry 243: 212: 202: 189:stratigraphy 155: 152: 145: 138: 135: 128: 120: 119: 106:thin section 84: 75: 64:Please help 56: 1447:Occupations 1428:Meteoritics 1294:Cartography 1250:Volcanology 1235:Geodynamics 912:Exfoliation 282:sedimentary 278:metamorphic 229:Methodology 219:mud logging 208:petrography 177:metamorphic 70:introducing 1525:Categories 1408:Geobiology 1383:Biogeology 1362:Seismology 1339:Geophysics 1266:Glaciology 1171:Mineralogy 970:Subsidence 932:Compaction 927:Diagenesis 917:Weathering 730:1226719524 443:References 258:geophysics 246:mineralogy 199:Background 123:(from 110:sand grain 1531:Petrology 1454:Geologist 1309:Geomatics 1176:Petrology 1080:Overviews 902:Extrusive 897:Intrusive 738:cite book 448:Citations 332:limestone 324:sandstone 204:Lithology 185:chemistry 121:Petrology 907:Volcanic 821:Geologic 772:MetPetDB 708:(2021). 692:(2001), 437:Pedology 396:See also 387:and the 309:volcanic 268:Branches 223:borehole 1509:Geology 1497:Geology 1286:Geodesy 1073:Geology 555:Sources 297:granite 274:igneous 213:In the 173:igneous 165:geology 66:improve 728:  718:  682:  664:  645:  627:  596:  575:  540:  493:  468:  359:schist 355:gneiss 351:marble 336:matrix 301:basalt 280:, and 179:, and 157:-logía 149:-λογία 139:pétros 132:πέτρος 1259:Water 373:crust 357:, or 347:slate 330:, or 328:shale 305:magma 169:rocks 127: 51:, or 744:link 726:OCLC 716:ISBN 680:ISBN 662:ISBN 643:ISBN 625:ISBN 594:ISBN 573:ISBN 538:ISBN 491:ISBN 466:ISBN 389:Moon 375:and 311:and 256:and 678:) 660:) 432:Ore 299:or 1527:: 740:}} 736:{{ 724:. 696:, 641:) 623:) 608:, 592:) 571:) 524:^ 514:. 353:, 349:, 326:, 276:, 175:, 104:A 55:, 47:, 1065:e 1058:t 1051:v 813:e 806:t 799:v 770:( 746:) 732:. 674:( 656:( 649:. 619:( 600:. 588:( 579:. 567:( 546:. 518:. 499:. 474:. 315:. 161:) 153:( 142:) 136:( 91:) 85:( 80:) 76:( 62:. 20:)

Index

Metamorphic petrology
list of references
related reading
external links
inline citations
improve
introducing
Learn how and when to remove this message

thin section
sand grain
cross-polarized
Ancient Greek
πέτρος
-λογία
-logía
geology
rocks
igneous
metamorphic
sedimentary petrology
chemistry
stratigraphy
sedimentary rock
Lithology
petrography
petroleum industry
mud logging
borehole

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.