Where: Utah (40.8° N, 111.8° W: paleocoordinates 3.0° N, 40.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Round Valley Formation, Bashkirian (323.2 - 315.2 Ma)

• It is not certain that Marcou's specimens came from the Round Valley Limestone, but it seems to be the most likely unit to be called "Mountain Limestone" in the vicinity of Salt Lake City.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Primary reference: J. Marcou. 1858. Geology of North America with two reports on the Prairies of Arkansas and Texas, the Rocky Mountains of New Mexico, and the Sierra Nevada of California 1-144 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 150953: authorized by Matthew Clapham, entered by Matthew Clapham on 18.09.2013

Creative Commons license: CC BY (attribution)