Biostratigraphical dating of the Thornton Fossil Konservat-Lagerstätte, Silurian, Illinois, USA
Geological Journal
By: David K. Loydell, Gary L. Mullins, Peep Mannik, Donald G. Mikulic, and Joanne Kluessendorf
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Abstract
Graptoloid graptolites, conodonts and chitinozoans from the lower part of the Racine Dolomite Formation at the Material Services Corporation quarry at Thornton indicate that the Fossil Konservat-Lagerstätte here is of late Sheinwoodian (early Wenlock) age. It is thus of an age approximately midway between those of the other Midwest Lagerstätten: within the Brandon Bridge Formation at Waukesha (Telychian), and the Mississinewa Shale (Gorstian) and Lecthaylus Shale (Gorstian). Conodonts indicate that the Fossil Konservat-Lagerstätte at Thornton corresponds to the ‘post Kockelella walliseri interregnum’ sensu Jeppsson (1997, Transactions of the Royal Society of Edinburgh: Earth Sciences88: 91–114)
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Biostratigraphical dating of the Thornton Fossil Konservat-Lagerstätte, Silurian, Illinois, USA |
| Series title | Geological Journal |
| DOI | 10.1002/gj.916 |
| Volume | 37 |
| Issue | 3 |
| Publication Date | August 05, 2002 |
| Year Published | 2002 |
| Language | English |
| Publisher | Wiley |
| Description | 10 p. |
| First page | 269 |
| Last page | 278 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |