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Stage in the
Netherlands. There are difficulties in reconciling how the Red Crag equates with international chronological stages. In particular, the start and end dates are poorly defined due to the general paucity of age-diagnostic stratigraphic indicators and the fragmentary nature of the geology.
340:. It is considered that the Red Crag at Walton-on-the–Naze is the oldest and that it was deposited in only a few decades at some time between 2.9 and 2.6 mya. This has led to the UK
525:
Zalasiewicz, J. A.; Mathers, S. J.; Hughes, M. J.; Gibbard, P. L.; Peglar, S. M.; Harland, R.; Nicholson, R. A.; Boulton, G. S.; Cambridge, P.; Wealthall, G. P. (19 December 1988).
386:
362:
263:, and the area in which the Crag Group was deposited was a tidally dominated marine bay. This bay would have been subjected to enlargement and contraction brought about by
309:, a coarse shelly sand with thin beds of clay and silt. It was interpreted as having been deposited in large scale sand waves where the sea bed was deeper. The overlying
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527:"Stratigraphy and palaeoenvironments of the Red Crag and Norwich Crag formations between Aldeburgh and Sizewell, Suffolk, England"
298:(SSSI); here a width of around 2 kilometres (1.2 mi) of Crag is exposed. At the coastline by Walton-on-the-Naze, remains of
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259:, a series of notably marine strata which belong to a period when Britain was connected to continental Europe by the
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The sediment in the outcrops mainly consists of coarse-grained and shelly sands that were deposited in sand waves (
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in south-eastern
Suffolk and north-eastern Essex. The name derives from its iron-stained reddish colour and
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463:
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139:
572:
Head, M. J. (1998). "Pollen and dinoflagellates from the Red Crag at Walton on the Naze, Essex".
282:) that migrated parallel to the shore in a south-westward direction. The most common fossils are
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It can also be difficult to separate the Red Crag from the overlying
Norwich Crag Formation.
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that were often worn by the abrasive environment. The most extensive exposure is found at
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429:
Dixon, R. G. (1979). "Sedimentary facies in Red Crag (Lower
Pleistocene, East Anglia)".
442:
703:
291:
77:
35:
634:. British Regional Geology (3rd ed.). London: Her Majesty's Stationery Office.
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52:
600:"Global Chronostratigraphical Correlation Table for the Last 2.7 Million Years"
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The Red Crag
Formation at depth in eastern Suffolk clearly has one member, the
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up to 20 metres (70 ft), locally up to 45 m, offshore up to 70 m
336:, the Red Crag sits within a segment of time from about 3.3 to 2.5
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Studies in mollusca of the Red Crag (Pleistocene, East Anglia)
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Shark tooth fossil from the Red Crag at
Felixstowe in Suffolk
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but there is more evidence to suggest that it is part of the
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which is an East
Anglian word for shells. It is part of the
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Lee, J. R.; Woods, M. A.; Moorlock, B. S. P., eds. (2015).
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It has been proposed that the Red Crag started in the late
313:, was provisionally assigned to the Red Crag based on its
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Geological map of the Crag
Deposits. From Chatwin (1954).
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532:Philosophical Transactions of the Royal Society B
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328:and to have possibly extended up into the early
380:Fossils from the Red Crag. From Chatwin (1954).
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8:
653:(5th ed.). British Geological Survey.
431:Proceedings of the Geologists' Association
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604:Subcommission on Quaternary Stratigraphy
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651:British Regional Geology: East Anglia
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130:Red Crag at Bawdsey Cliff in Suffolk
296:Site of Special Scientific Interest
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485:"Designated Sites: Bawdsey Cliff"
40:Late Pliocene - Early Pleistocene
560:Lee, Woods & Moorlock (2015)
417:Lee, Woods & Moorlock (2015)
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631:East Anglia and adjoining areas
606:. University of Cambridge. 2011
514:UK Fossils - Walton on the Naze
710:Geologic formations of England
1:
443:10.1016/s0016-7878(79)80014-0
473:– via British Library.
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271:driven by the 40,000-year
586:10.1017/S0016756898001745
334:British Geological Survey
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34:
294:, which is designated a
178:Coralline Crag Formation
720:Escarpments of England
715:Neogene United Kingdom
628:Chatwin, C.P. (1954).
546:10.1098/rstb.1988.0125
319:Norwich Crag Formation
261:Weald–Artois Anticline
168:Norwich Crag Formation
456:Dixon, R. G. (1977).
464:University of London
245:geological formation
140:Geological formation
682: /
574:Geological Magazine
419:, pp. 110–111.
342:stratigraphic stage
273:Milankovitch cycles
36:Stratigraphic range
686:51.9994°N 1.4211°E
241:Red Crag Formation
30:Red Crag Formation
660:978-0-85272-823-9
562:, pp. 92–93.
539:(1210): 221–272.
311:Thorpeness Member
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643:Bibliography
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608:. Retrieved
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467:. Retrieved
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302:were found.
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689: /
580:: 803–817.
330:Pleistocene
280:megaripples
269:regressions
704:Categories
674:51°59′58″N
401:References
288:gastropods
257:Crag Group
150:Crag Group
677:1°25′16″E
350:Reuverian
346:Waltonian
315:lithology
300:megalodon
192:Lithology
184:Thickness
164:Underlies
156:Sub-units
18:Waltonian
610:5 August
469:18 April
326:Pliocene
284:bivalves
249:outcrops
207:Location
174:Overlies
499:5 April
462:(PhD).
232:England
220:Country
197:Primary
146:Unit of
114:↓
657:
229:
215:Europe
212:Region
488:(PDF)
344:name
243:is a
655:ISBN
612:2016
501:2018
471:2018
286:and
267:and
253:crag
239:The
201:Sand
136:Type
53:PreꞒ
582:doi
578:135
541:doi
537:322
439:doi
338:mya
706::
620:^
602:.
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490:.
435:90
433:.
409:^
321:.
275:.
103:Pg
47:Ma
38::
663:.
614:.
588:.
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543::
503:.
445:.
441::
108:N
98:K
93:J
88:T
83:P
78:C
73:D
68:S
63:O
58:Ꞓ
42:~
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
