(Early-Middle Caradoc)
| Palaeos: Paleozoic | |
Late Ordovician Epoch |
| Ordovician period | Sandbian Age (Early-Middle Caradoc) |
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The Ordovician has been quite significantly revised in recent years. The traditional division of the Late Ordovician into the Caradoc and Ashgill has been replaced by a three-part division. The first of these is the Sandbian, which is more or less equivalent to the Early Caradoc and most of the Middle Caradoc. The Katian includes the Late Caradoc and all of the Ashgill prior to the start of serious global cooling. The Hirnantian, formerly a stage of the Ashgill, is now the final age of the Ordovician. ATW080323.
Order Strophomenida
Family Sowerbyellidae
Sowerbyella sericea (Sowerby)
Sandbian
England
shell about 1 cm wide
more
on Swerbyella
(at the Union
College Geology Department site)
 |
Links | |
Mohawk
Valley Fossils - a very informative site, put together by the
Union College Geology Department. Detailed surveys of occurrences of fossils of creatures that lived during
Late Sandbian to Early Katian times (probably
Longvillian and Actonian).
Ordovician Trentonian fauna from the Galena and Maquoketa of West DePere
and Green Bay Wisconsin
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unless otherwise indicated, content by M. Alan
Kazlev 1998-2002
page uploaded 8 June 2002
last modified ATW080323
checked ATW050511
(original page uploaded on Kheper site 27 May 1998)
