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thickness. By his identification of particular graptolite species in different zones of the Dob's Linn exposure, Lapworth was able to demonstrate that the
Uplands consist of a much thinner layer, consistent with Silurian deposits elsewhere, that had been repeatedly folded and faulted, with multiple repetitions of the same strata, often upside down. The understanding that sequences of sedimentary rocks could be inverted played an important part in the later resolution of the
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sequences. A more recent description of the area, enumerating the zones established by
Lapworth, is given in the British Regional Geology Monograph. Before Lapworth's work, it was thought that the Silurian rocks of the Southern Uplands formed a single sequence, that would have to be about 6000m in
555:
graptolite fossils on black shale (26 x 25 millimetres) of middle
Ordovician age (Soudleyan Stage, ~mid-Caradocian) from the main cliff at Dob's Linn (about 36.1-43.1 metres below the Ordovician-Silurian boundary
522:
372:
Underwood, C J; S F Crowley; J D Marshall; P J Brenchley (July 1997). "High-resolution carbon isotope stratigraphy of the basal
Silurian Stratotype (Dob's Linn, Scotland) and its global correlation".
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sequence with shallow water sequences elsewhere, although the stratotype also appears to correspond with a
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isotope excursion in the latest
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446:(2 ed.). London: Her Majesty's Stationery Office (HMSO). pp.
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Plan of the typical locality of Dobb's Linn (sic) (after
Lapworth)
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465:. Chicago: The University of Chicago Press. pp. 217–265.
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National Trust for
Scotland: Grey Mare's Tail Nature Reserve
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1.6 m above the base of the
Birkhill Shale Formation. The
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Dob's Linn is important in geology as the location of the
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Folds in the Rock Strata high up in the Dob's Linn Gorge
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in the late 19th century. His work established fossil
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Lapworth's original map of the exposure at Dob's Linn
166:. According to tradition, Dob's Linn is named for a
496:from: Scottish Borders geology: an excursion guide
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443:British regional Geology: The South of Scotland
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197:. Dob's Linn was ratified as the GSSP by the
181:(GSSP) which marks the boundary between the
179:Global Boundary Stratotype Section and Point
415:Quarterly Journal of the Geological Society
313:"GSSP for the Ordovician-Silurian Boundary"
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199:International Union of Geological Sciences
32:Looking down Dob's Linn Gorge from the top
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490:Clarkson, E.N.K.; Taylor, C.M. (1992).
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812:Geological type localities of Scotland
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146:, just north of the A708 road between
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837:Dumfries and Galloway geography stubs
259:in which Lapworth was also involved.
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678:
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286:
492:"Dob's Linn, Moffat - an excursion"
296:. London: Blackie and Son. p.
189:periods, and marks the base of the
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807:Stratigraphy of the United Kingdom
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427:10.1144/GSL.JGS.1878.034.01-04.23
374:Journal of the Geological Society
293:The works of the Ettrick shepherd
822:History of Dumfries and Galloway
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290:(1869). Thomson, Thomas (ed.).
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242:The area was first studied by
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755:. You can help Knowledge by
698:. You can help Knowledge by
641:. You can help Knowledge by
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164:National Trust for Scotland
142:is a small steep valley in
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832:Paleontological site stubs
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409:Lapworth, Charles (1878).
213:Parakidograptus acuminatus
174:in the late 17th century.
498:. Scottish Academic Press
463:The Highlands Controversy
461:Oldroyd, David R (1990).
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72:300 m (980 ft)
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637:-related article is a
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223:section also contains
162:which is owned by the
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257:Highlands Controversy
144:Dumfries and Galloway
93:Dumfries and Galloway
692:paleontological site
594:55.42972°N 3.26972°W
440:Pringle, J. (1948).
217:Akidograptus ascensu
158:. It is part of the
802:Fossils of Scotland
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411:"The Moffat Series"
195:geologic time scale
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817:Paleozoic Scotland
599:55.42972; -3.26972
121:55.4297°N 3.2697°W
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349:. Archived from
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315:. Archived from
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233:biostratigraphic
206:first appearance
191:Llandovery epoch
172:The Killing Time
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355:. Retrieved
351:the original
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339:"Dob's Linn"
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321:. Retrieved
317:the original
311:Ogg, James.
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288:Hogg, James
248:graptolites
210:graptolites
124: /
99:Coordinates
796:Categories
582:55°25′47″N
502:28 January
380:(4): 709.
263:References
225:chitinozoa
183:Ordovician
168:covenanter
140:Dob's Linn
109:55°25′47″N
57:Dob's Linn
21:Dob's Linn
585:3°16′11″W
382:CiteSeerX
237:carbon-13
229:conodonts
201:in 1984.
193:, on the
112:3°16′11″W
77:Geography
187:Silurian
156:Scotland
90:District
85:Scotland
512:Gallery
152:Selkirk
133:
82:Country
469:
384:
357:1 July
323:1 July
148:Moffat
747:This
690:This
633:This
221:shale
154:, in
753:stub
696:stub
639:stub
556:GSSP
504:2019
467:ISBN
450:–46.
359:2006
325:2006
227:and
215:and
185:and
150:and
423:doi
392:doi
378:154
208:of
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
