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

Where: Nevada (39.3° N, 114.9° W: paleocoordinates 7.7° S, 71.7° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: High Lake Member (Laketown Dolomite Formation), Aeronian (440.8 - 438.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lenticular, gray dolomite

• light-gray to medium-gray, very finely to coarsely crystalline dolostone that is medium- to very thick-bedded, partly lenticular and laminated.

Collection methods: bulk, hydrochloric,

Primary reference: P. M. Sheehan. 1982. Late Ordovician and Silurian of the eastern Great Basin Part 4. Late Llandovery and Wenlock brachiopods. Milwaukee Public Museum Contributions in Biology and Geology 50:1-73 [M. Patzkowsky/Z. Krug/Z. Krug]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 51520: authorized by Mark Patzkowsky, entered by Zack Krug on 07.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only.
Strophomenata
 Strophomenida -
 Strophomenida - Sowerbyellidae
Eoplectodonta sp. Kozlowski 1929
 Strophomenida -
Rhynchonellata
 Spiriferida - Cyrtiidae
Cyrtia spp. Dalman 1828
 Spiriferida - Reticulariidae
 Pentamerida -
Pentamerida indet. Schuchert and Cooper 1931
 Pentamerida - Pentameridae
Pentameroides sp. Schuchert and Cooper 1931
sp. B
 Atrypida - Atrypidae
 Atrypida - Atrypinidae
Spirigerina sp. d'Orbigny 1849
sp. A
 Orthida -
Orthida indet. Schuchert and Cooper 1932
 Orthida - Dicoelosiidae
Dicoelosia biloba Linnaeus 1758
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
"Resserella" sp. Bancroft 1928
 Orthida - Hesperorthidae
Osteichthyes
 Dipnoi - Phaneropleuridae
Pentlandia merriami n. sp. lungfish