Harding sandstone cephalopods, Twin Mountain (Ordovician of the United States)

Where: Fremont County County, Colorado (38.4° N, 105.3° W: paleocoordinates 14.5° S, 73.8° W)

• coordinate based on nearby landmark

When: Harding Sandstone Formation, Franklinian (457.3 - 449.6 Ma)

Environment/lithology: offshore; shale

• from a shaly zone near the middle of the Harding sandstone, and about 30 feet above its base

Size class: macrofossils

Primary reference: R.H. Flower. 1952. Cephalopods from the Harding and Manitou Formations of Colorado. Journal of Paleontology 26(3):505-518 [B. Seuss/B. Seuss/B. Seuss]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 216976: authorized by Barbara Seuss, entered by Barbara Seuss on 08.01.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Actinocerida - Ormoceratidae
Ormoceras pollacki n. sp.
holotype and paratype at the Paleontological Research Institution