Tony Grove Lake Member, Great Basin, Southern Egan Range (Silurian of the United States)

Where: Nevada (39.3° N, 114.9° W: paleocoordinates 7.6° S, 72.2° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Tony Grove Lake Member (Laketown Dolomite Formation), Rhuddanian (443.4 - 440.8 Ma)

Environment/lithology: shallow subtidal; gray dolomite

• Light gray to grayish-black, micricrystalline to finely crystalline dolostone, which ranges from thin- to very thick-bedded

Primary reference: P. M. Sheehan. 1980. The Late Ordovician and Silurian of the Eastern Great Basin, Part 3. Brachiopods of the Tony Grove Lake Member of the Laketown Dolomite. Milwaukee Public Museum Contributions in Biology and Geology 30:1-23 [M. Patzkowsky/Z. Krug/Z. Krug]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 51493: authorized by Mark Patzkowsky, entered by Zack Krug on 06.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only.
 Pentamerida - Virgianidae
Virgiana utahensis n. sp. Sheehan 1980
 Atrypida - Atrypidae
Plectatrypa sp. Schuchert and Cooper 1930
 Orthida - Platystrophiidae