Stratigraphical and palaeoecological importance of Caradoc (Upper Ordovician) graptolites from the Cardigan area, southwest Wales

Geological Magazine

Volumn 140, Issue 5, 2003, Pages 549-571

  Williams, Mark ^a   Davies, Jeremy R ^a   Waters, Richard A ^a   Rushton, Adrian W A ^b   Wilby, Philip R ^a  

^a BRITISH GEOLOGICAL SURVEY   (United Kingdom)

^b DEPARTMENT OF LIFE SCIENCES   (United Kingdom)

Author keywords

Biostratigraphy; Graptolites; Ordovician; Palaeoecology

Indexed keywords

ANIMALS; BIOSTRATIGRAPHY;

BIOZONES; GRAPTOLITES; ISLAND FORMATION; NEWPORT; ORDOVICIAN; PALAEOECOLOGY; SEDIMENTARY ROCK SEQUENCES;

SEDIMENTARY ROCKS;

BIOSTRATIGRAPHY; FOSSIL ASSEMBLAGE; ORDOVICIAN; PALEOECOLOGY;

CARDIGAN BAY; UNITED KINGDOM; WALES;

GRAPTOLOIDEA;

EID: 0242415450     PISSN: 00167568     EISSN: None     Source Type: Journal    
DOI: 10.1017/S0016756803008057     Document Type: Article

References (36)

1. ARMSTRONG, H. A. & COE, A. L. 1997. Deep sea sediments record the geophysiology of the end Ordovician glaciation. Journal of the Geological Society, London 154, 929-34.
2. ARMSTRONG, H. A. & OWEN, A. W. 2002. Euconodont diversity changes in a cooling and closing Iapetus Ocean. In Palaeobiogeography and biodiversity change: the Ordovician and Mesozoic-Cenozoic Radiations (eds J. A. Crame and A. W. Owen), pp. 85-98. Geological Society of London, Special Publication no. 194.
3. BARNES, C. R., FORTEY, R. A. & WILLIAMS, S. H. 1995. The pattern of global bio-events during the Ordovician period. In Global events and event stratigraphy in the Phanerozoic (ed. O. H. Walliser), pp. 141-72. Springer.
4. BETTLEY, R. M., FORTEY, R. A. & SIVETER, D. J. 2001. High-resolution correlation of Anglo-Welsh Middle to Upper Ordovician sequences and its relevance to international chronostratigraphy. Journal of the Geological Society, London 158, 937-52.
5. BEVINS, R. E. & ROACH, R. A. 1979. Early Ordovician volcanism in Dyfed, SW Wales. In The Caledonides of the British Isles - reviewed (eds A. L. Harris, C. H. Holland and B. E. Leake), pp. 603-9. Geological Society of London, Special Publication no. 8.
6. BRITISH GEOLOGICAL SURVEY. 2002. Cardigan, England and Wales Sheet 193. Solid and Drift. 1:50 000. Keyworth, Nottingham: British Geological Survey.
7. CAVE, R. 1979. Sedimentary environments of the basinal Llandovery of mid-Wales. In The Caledonides of the British Isles - reviewed (eds A. L. Harris, C. H. Holland and B. E. Leake), pp. 517-26. Geological Society of London, Special Publication no. 8.
8. DAVIES, J. R., FLETCHER, C. J. N., WATERS, R. A., WILSON, D., WOODHALL, D. G. & ZALASIEWICZ, J. A. 1997. Geology of the country around Llanilar and Rhayader. Memoir of the British Geological Survey, Sheets 178 and 179 (England and Wales).
9. DAVIES, J. R., WATERS, R. A., WILBY, P. R., WILLIAMS, M. & WILSON, D. 2003. The Cardigan and Dinas Island district - a brief explanation of the geology. 1 : 50 000 Series England and Wales Sheet 193 (including part of Sheet 210). Keyworth: British Geological Survey.
10. ELLES, G. L. & WOOD, E. M. R. 1901-1918. A Monograph of British Graptolites. Parts 1-52. Monograph of the Palaeontographical Society, London.
11. EVANS, W. D. 1945. The Geology of the Prescelly Hills, North Pembrokeshire. Quarterly Journal of the Geological Society of London 101, 89-110.
12. FINNEY, S. C. 1986. Graptolite biofacies and correlation of eustatic, subsidence, and tectonic events in the middle to upper Ordovician of North America. Palaios 1, 435-61.
13. FINNEY, S. C. & BERRY, W. B. N. 1997. New perspectives on graptolite distributions and their use as indicators of platform margin dynamics. Geology 25, 919-22.
14. FINNEY, S. C. & BERRY, W. B. N. 1999. Late Ordovician graptolite extinction: the record from continental margin sections in central Nevada, USA. Acta Universitatis Carolinae - Geologica 43, 195-8.
15. FINNEY, S. C., GRUBB, B. J. & HATCHER, R. J. JR. 1996. Graphic correlation of middle Ordovician graptolite shale, southern Appalachians: an approach for examining the subsidence and migration of a Taconic foreland basin. Geological Society of America Bulletin 108, 355-71.
16. FORTEY, R. A., HARPER, D. A. T., INGHAM, J. K., OWEN, A. W., PARKES, M. A., RUSHTON, A. W. A. & WOODCOCK, N. H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society of London, Special Report No. 24.
17. GOLDMAN, D., MITCHELL, D. E. & JOY, M. P. 1999. The stratigraphic distribution of graptolites in the classic upper Middle Ordovician Utica Shale of New York State: an evolutionary succession or a response to relative sea-level change? Paleobiology 25, 273-94.
18. HOWELLS, M. F. & SMITH, M. 1997. The geology of the country around Snowdon. Memoir of the British Geological Survey. Sheet 119 (England and Wales).
19. JAMES, D. M. D. 1975. Caradoc turbidites at Poppit Sands (Pembrokeshire), Wales. Geological Magazine 112, 295-304.
20. JAMES, D. M. D. 1997. Llanvirn-Llandovery activity on the Llangrannog Lineament in southwest Ceredigion. Mercian Geologist 14, 68-78.
21. KEEPING, W. 1882. The Geology of Cardigan Town. Geological Magazine 19, 519-22.
22. KOKELAAR, P. 1988. Tectonic controls of Ordovician arc and marginal basin volcanism in Wales. Journal of the Geological Society, London 145, 759-75.
23. KOKELAAR, P., HOWELLS, M. F., BEVINS, R. E. & DUNKELEY, P. N. 1984a. The Ordovician marginal basin of Wales. In Marginal Basin Geology: volcanic associated sedimentary and tectonic processes in modern and ancient marginal basins (eds P. Kokelaar and M. F. Howells), pp. 245-69. Geological Society of London, Special Publication no. 16.
24. KOKELAAR, P., HOWELLS, M. F., BEVINS, R. E. & ROACH, R. A. 1984b. Volcanic associated sedimentary and tectonic processes in the Ordovician marginal basin of Wales. A field guide. In Marginal Basin Geology: volcanic associated sedimentary and tectonic processes in modern and ancient marginal basins (eds P. Kokelaar and M. F. Howells), pp. 291-322. Geological Society of London, Special Publication no. 16.
25. LATTER, M. P. 1925. Note on the age of the rocks around the Teifi estuary. Geological Magazine 62, 187-8.
26. LOWMAN, R. D. W. & BLOXAM, T. W. 1981. The petrology of the Lower Palaeozoic Fishguard Volcanic Group and associated rocks E of Fishguard, N Pembrokeshire (Dyfed), South Wales. Journal of the Geological Society, London 138, 47-68.
27. MCCANN, T. 1992. The stratigraphy of the Ordovician rocks around Cardigan, Wales. Proceedings of the Yorkshire Geological Society 49, 57-65.
28. MYERS, J. 1950. Note on the age of the rocks on the east side of Newport Bay, Pembrokeshire. Geological Magazine 50, 263-4.
29. RUSHTON, A. W. A. 1999. General Introduction. In British Cambrian to Ordovician stratigraphy (eds A. W. A. Rushton, A. W. Owen, R. M. Owens and J. K. Prigmore), pp. 3-12. Geological Conservation Review Series no. 18. Peterborough: Joint Nature Conservation Committee.
30. STRACHAN, I. 1997. A bibliographic index of British graptolites (Graptoloidea). Part 2. Monograph of the Palaeontographical Society, London 151, 41-155. (Publ. no. 603).
31. VANDENBERG, A. H. M. & COOPER, R. A. 1992. The Ordovician graptolite sequence of Australasia. Alcheringa 16, 33-85.
32. WILLIAMS, S. H. 1982. Upper Ordovician graptolites from the top Lower Hartfell Shale Formation (D. clingani and P. linearis zones) near Moffat, southern Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 72 (for 1981), 229-55.
33. WILLIAMS, S. H. 1994. Revision and definition of the C. wilsoni graptolite Zone (middle Ordovician) of southern Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 85, 143-57.
34. WILLIAMS, S. H. 1995. Middle Ordovician graptolites from the Lawrence Harbour Formation, central Newfoundland, Canada. Palaeontographica A235, 21-77.
35. WILLIAMS, S. H. & BRUTON, D. L. 1983. The Caradoc-Ashgill boundary in the central Oslo Region and associated graptolite faunas. Norsk Geologisk Tidsskrift 63, 147-91.
36. ZALASIEWICZ, J. A., RUSHTON, A. W. A. & OWEN, A. W. 1995. Late Caradoc graptolitic faunal gradients across the Iapetus Ocean. Geological Magazine 135, 611-17.