D1494a-CO. Stargo Spring, Monitor Range. (Ordovician of the United States)

Where: Nevada (38.9° N, 116.5° W: paleocoordinates 5.6° S, 81.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Paralenorthis-Orthidiella brachiopod zone, Antelope Valley Formation (Pogonip Group), Rangerian (470.0 - 470.3 Ma)

• Sponge beds occur at the boundary between the Orthidiella and Anomalorthis zones.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

• uppermost slope of a carbonate platform or outer shelf
• wackestone/packstone/mudstone with shale interbeds

Size class: macrofossils

Primary reference: J. Sprinkle. 1974. New Rhombiferan Cystoids from the Middle Ordovician of Nevada. Journal of Paleontology 48(6):1174-1201 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 195515: authorized by Pete Wagner, entered by Pete Wagner on 10.08.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

• trilobites, brachiopods, gastropods, and echinoderms reported to be present, but not listed
Show authors, comments, and common names
 Rhombifera - Pleurocystitidae
Plethoschisma grandis
Plethoschisma grandis Sprinkle 1974