Knowledge (XXG)

Richard Dixon Oldham

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238: 250: 226: 287: 295: 216:. He also included accounts of earth-waves that could be seen travelling across the plain, and of waterspouts. During the cold season following the earthquake, the Survey carried out a re-triangulation of part of the area that had been initially surveyed in 1860. They found displacements of up to 12 feet both in distances and heights, substantially larger than could be due to errors. This was one of the earliest reports of such a re-survey. 237: 33: 306:
In subsequent papers, Oldham compared data from numerous earthquakes, with seismic observations at different distances from the epicentre. He found a discontinuity in the travel times for the S-waves at about 120° angular distance from the earthquake, suggesting refraction by a dense core with a
275:, with lateral movement, which he referred to as distortional. The third phase was of large undulations. The times of arrival of these phases indicated that the first two had travelled through the body of the earth, while the third were 249: 225: 243:
The Chedrang fault cutting the bed of the Chedrang River. The fault face forms the right bank of the current watercourse, and part of the former bed of the river can be seen above the fault face.
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went far beyond reports of previous earthquakes. It included a description of the Chedrang fault, with uplift up to 35 feet and reported accelerations of the ground that had exceeded the
1869: 307:
diameter of about 0.4 that of the earth. Oldham was not the first to suggest that the earth had a dense core, but he provided the first direct evidence of its existence and size.
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A Bibliography of Indian Geology: Being a List of Books and Papers, Relating to the Geology of British India and Adjoining Countries, Published Previous to the End of AD 1887
759: 204:. He wrote about 40 publications for the Survey on geological subjects including hot springs, the geology of the Son Valley and the structure of the Himalayas and the 330: 267:
at distant locations. In the report of the 1897 earthquake he presented data, mainly from stations in Italy, that showed three phases. The first to arrive, the
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Oldham's most important contribution to seismology was the first clear identification of the separate arrivals of different groups of waves, as detected by
1261: 916:"The Constitution of the Interior of the Earth, as revealed by Earthquakes:(Second Communication). Some New Light on the Origin of the Oceans" 1859: 1220:
A Manual of the Geology of India: Chiefly Compiled from the Observations of the Geological Survey: Stratigraphical and Structural Geology
1446: 506: 286: 153:; 31 July 1858 – 15 July 1936) was a British geologist who made the first clear identification of the separate arrivals of 1854: 1587: 1798: 1316: 299: 290:
Transmission of earthquake waves, as affected by the presence of a core of 0.4 of the earth's diameter. From Oldham (1906)
1864: 1627: 1511: 1466: 1426: 1396: 1270: 949:"The Geological Interpretation of the Earth - Movements associated with the Californian Earthquake of April 18th, 1906" 1849: 1612: 1496: 326: 182: 121: 1772: 1501: 1451: 444: 197: 1254: 1697: 1687: 1637: 1431: 1421: 1411: 1296: 1082: 1808: 1747: 1682: 1326: 1201: 1184: 594: 1727: 1602: 1572: 1552: 1506: 1486: 1406: 1346: 1306: 1286: 1247: 1066:"The structure of the Himalayas and of the Gangetic plain: as elucidated by geodetic observations in India" 1762: 1717: 1712: 1632: 1547: 1083:"The Portolan Maps of the Rhône Delta: A Contribution to the History of the Sea Charts of the Middle Ages" 1672: 1622: 1592: 1562: 366: 318:. He continued to be active in the field, publishing papers on earthquakes in Guatemala and California. 209: 190: 360: 350: 310:
In 1903, Oldham resigned from the GSI due to ill-health and returned to the United Kingdom, living in
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Monument to George Inglis, Chatak, showing the upper part twisted with respect to the base.
1777: 1702: 1386: 1371: 1356: 1301: 346: 1024: 693: 1173: 1148: 1040: 997: 863: 830: 772: 668: 627: 535: 402: 1818: 1813: 1732: 1707: 1677: 1557: 1416: 1376: 964: 931: 898: 813: 283:, they showed that the Earth could be treated as elastic in studies of seismic waves. 1833: 1692: 1667: 1642: 1582: 1567: 1401: 1391: 1351: 1336: 1164: 972: 939: 906: 821: 737: 684: 643: 178: 1056: 1742: 1527: 1217:
Medlicott, Henry Benedict; Blanford, William Thomas; Oldham, Richard Dixon (1893).
356: 276: 186: 162: 271:, were compression waves, which he referred to as condensational. Next came the 1782: 1135:—— (1926). "The depth and twofold character of earthquake origins". 981: 847: 754: 410: 322: 1234: 1218: 1471: 676: 635: 264: 166: 704: 333:. Later in his life he became interested in the geography and history of the 982:"On the Effect of the Gangetic Alluvium on the Plumb-Line in Northern India" 201: 1006: 883:"The Constitution of the Interior of the Earth, as Revealed by Earthquakes" 872: 780: 575: 418: 298:
Map of the San Andreas Fault, California, showing displacements due to the
1025:"The constitution of the interior of the Earth as revealed by earthquakes" 334: 1127: 231:
Sketch map of the Samin and Chedrang faults, showing the uplift in feet.
1106: 728: 106: 848:"The Rate of Transmission of the Guatemala Earthquake, April 19, 1902" 612:"Essays on Speculative Geology. 1. - On Homotaxis and Contemporaneity" 389:
Bragg, W. (1936). "Tribute to deceased fellows of the Royal Society".
32: 1048: 1015: 788: 272: 268: 158: 154: 56: 1114:—— (1926). "The Post-Roman History of the Rhone Delta". 1098: 720: 543: 1156: 315: 293: 285: 653:"Essays on Speculative Geology. 2 - Probable Changes of Latitude" 1223:. Calcutta: Office of the Superintendent of Government Printing. 169:
and the first clear evidence that the Earth has a central core.
1243: 595:"Report on the geology of parts of Manipur and the Naga Hills" 311: 755:"On the Propagation of Earthquake Motion to Great Distances" 208:. His most famous work was in seismology. His report on the 522:
Brush, Stephen G. (1980). "Discovery of the Earth's core".
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In 1879 Oldham became an assistant-superintendent with the
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measuring Earth's core; separate arrival of seismic phases
698:. Calcutta: Superintendent, Government Printing, India. 562:
Davison, C. (1936). "Richard Dixon Oldham. 1858-1936".
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Thinking about the Earth: A History of Ideas in Geology
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Science Progress in the Twentieth Century (1919-1933)
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Proceedings of the Royal Society of London. Series A
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Proceedings of the Royal Society of London. Series A
798:"On the Origin of the Dunmail Raise (Lake District)" 456: 454: 139: 136: 1791: 1520: 1279: 738:"Report of the great earthquake of 12th June, 1897" 145: 130: 102: 87: 79: 63: 42: 23: 831:"On Tidal Periodicity in the Earthquakes of Assam" 279:. Since these observations agreed with theory for 760:Philosophical Transactions of the Royal Society A 564:Obituary Notices of Fellows of the Royal Society 434: 432: 430: 428: 1870:Presidents of the Geological Society of London 1272:Presidents of the Geological Society of London 501:. Harvard University Press. pp. 234–236. 1255: 331:President of the Geological Society of London 8: 1185:"The Cachar earthquake of 10th January 1869" 1175:Geological Glossary: For the Use of Students 1200:Oldham, Thomas (1882). Oldham, R.D. (ed.). 1183:Oldham, Thomas (1882). Oldham, R.D. (ed.). 1172:Oldham, Thomas (1879). Oldham, R.D. (ed.). 953:Quarterly Journal of the Geological Society 920:Quarterly Journal of the Geological Society 887:Quarterly Journal of the Geological Society 802:Quarterly Journal of the Geological Society 441:Complete Dictionary of Scientific Biography 1262: 1248: 1240: 742:Memoirs of the Geological Society of India 20: 1206:Memoirs of the Geological Survey of India 1189:Memoirs of the Geological Survey of India 1070:Memoirs of the Geological Survey of India 1005: 871: 599:Memoirs of the Geological Survey of India 835:Journal of the Asiatic Society of Bengal 384: 382: 378: 221: 484: 472: 460: 329:, and from 1920 to 1922 served as the 185:and geologist, Oldham was educated at 557: 555: 553: 7: 748:. K. Paul, Trench, Trübner & co. 705:"The Evolution of Indian Geography" 214:Earth's gravitational acceleration 14: 965:10.1144/GSL.JGS.1909.065.01-04.03 932:10.1144/GSL.JGS.1907.063.01-04.24 899:10.1144/GSL.JGS.1906.062.01-04.21 814:10.1144/GSL.JGS.1901.057.01-04.14 337:delta. He died on 15 July 1936. 248: 236: 224: 126: 31: 321:In 1908 Oldham was awarded the 1202:"The Thermal Springs of India" 1: 1860:Fellows of the Royal Society 524:American Journal of Physics 411:10.1126/science.84.2190.539 327:Fellow of the Royal Society 183:Fellow of the Royal Society 1886: 198:Geological Survey of India 1432:Warington Wilkinson Smyth 677:10.1017/S0016756800145133 636:10.1017/S0016756800145121 439:"Oldham, Richard Dixon". 112: 95: 30: 1087:The Geographical Journal 709:The Geographical Journal 177:Born on 31 July 1858 to 1447:George Douglas Campbell 1407:Joseph Ellison Portlock 1347:George Bellas Greenough 1307:George Bellas Greenough 1287:George Bellas Greenough 1081:—— (1925). 1064:—— (1917). 1023:—— (1914). 980:—— (1914). 947:—— (1909). 914:—— (1907). 881:—— (1906). 846:—— (1905). 829:—— (1902). 796:—— (1901). 753:—— (1900). 736:—— (1899). 703:—— (1894). 692:—— (1888). 651:—— (1886). 610:—— (1886). 497:Oldroyd, David (1996). 445:Charles Scribner's Sons 1713:William Alexander Deer 1633:Herbert Leader Hawkins 1137:The Journal of Geology 1007:10.1098/rspa.1914.0032 873:10.1098/rspa.1905.0007 781:10.1098/rsta.1900.0015 576:10.1098/rsbm.1936.0008 303: 291: 1855:British seismologists 1673:Walter Campbell Smith 1623:Henry Hurd Swinnerton 1563:Arthur Smith Woodward 1422:Andrew Crombie Ramsay 593:Oldham, R.D. (1883). 367:List of geophysicists 314:and various parts of 297: 289: 210:1897 Assam earthquake 191:Royal School of Mines 767:(252–261): 135–174. 447:. 2008. p. 203. 359:– showed that 349:– showed that 302:. From Oldham (1909) 273:S or Secondary waves 119:Richard Dixon Oldham 37:Richard Dixon Oldham 25:Richard Dixon Oldham 1865:Lyell Medal winners 1688:Sydney Hollingworth 1648:Herbert Harold Read 1472:John Whitaker Hulke 1462:Henry Clifton Sorby 1457:Peter Martin Duncan 1437:Thomas Henry Huxley 1149:1926JG.....34..385O 1041:1914Natur..92..684O 998:1914RSPSA..90...32O 864:1905RSPSA..76..102O 773:1900RSPTA.194..135O 669:1886GeoM....3..300O 657:Geological Magazine 628:1886GeoM....3..293O 616:Geological Magazine 536:1980AmJPh..48..705B 403:1936Sci....84..539B 1850:British geologists 1683:James Stubblefield 1638:William Fearnsides 1367:Roderick Murchison 1342:Roderick Murchison 361:Earth's inner core 351:Earth's outer core 304: 292: 269:P or Primary waves 1827: 1826: 1804:Mark Moody-Stuart 1698:Frederick Shotton 1658:Owen Thomas Jones 1618:Owen Thomas Jones 1497:Wilfred Hudleston 1382:Henry De la Beche 1317:William Babington 1292:Henry Grey Bennet 1035:(2312): 684–685. 397:(2190): 539–546. 325:, in 1911 made a 200:, working in the 116: 115: 97:Scientific career 16:British geologist 1877: 1543:Archibald Geikie 1533:Charles Lapworth 1512:William Whitaker 1492:Archibald Geikie 1487:William Blanford 1482:John Wesley Judd 1467:Robert Etheridge 1442:Joseph Prestwich 1427:William Hamilton 1397:William Hamilton 1362:William Buckland 1322:William Buckland 1273: 1264: 1257: 1250: 1241: 1224: 1213: 1196: 1179: 1168: 1131: 1110: 1077: 1060: 1049:10.1038/092684c0 1019: 1009: 976: 943: 926:(1–4): 344–350. 910: 893:(1–4): 456–475. 877: 875: 858:(508): 102–111. 842: 825: 808:(1–4): 189–197. 792: 749: 732: 699: 688: 647: 606: 580: 579: 559: 548: 547: 519: 513: 512: 494: 488: 482: 476: 470: 464: 458: 449: 448: 443:. 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Index


Dublin
Geology
FRS
/ˈldəm/
P-waves
S-waves
surface waves
seismograms
Thomas Oldham
Fellow of the Royal Society
Rugby School
Royal School of Mines
Geological Survey of India
Himalayas
Ganges plain
1897 Assam earthquake
Earth's gravitational acceleration
Sketch map of the Samin and Chedrang faults, showing the uplift in feet.
The Chedrang fault cutting the bed of the Chedrang River. The fault face forms the right bank of the current watercourse, and part of the former bed of the river can be seen above the fault face.
Monument to George Inglis, Chatak, showing the upper part twisted with respect to the base.
seismograms
P or Primary waves
S or Secondary waves
surface waves
elastic waves


1906 Earthquake
Kew

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