2 miles north of Martin's Ridge (Ordovician of the United States)

Also known as Martin Ridge

Where: Eureka County, Nevada (39.3° N, 116.4° W: paleocoordinates 6.4° S, 77.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: B Member (Copenhagen Formation), Mohawkian (457.3 - 451.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: yellow limestone

• Overlying the "lower sandstone" occurs about 150 feet of thin-bedded, yellow-weathering limestone abounding in fossils. Generally the specimens are not well preserved, and they are not silicified.

Size class: macrofossils

Collected by F.C. Shaw and H.B. Whittington in 1965

Primary reference: G. A. Cooper. 1956. Chazyan and related brachiopods. Smithsonian Miscellaneous Collections 127:1-1245 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 186188: authorized by Pete Wagner, entered by Pete Wagner on 17.06.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Plectambonitidae
Isophragma ponderosum n. sp.
Isophragma ponderosum n. sp. Cooper 1956