Hanson Creek Formation, Martin Ridge, Eureka Co., Nevada (Ordovician of the United States)

Where: Nevada (39.2° N, 116.4° W: paleocoordinates 6.4° S, 77.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hanson Creek Formation, Caradoc (458.4 - 449.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: basinal (); gray, argillaceous lime mudstone

• Very dark gray fissile argillaceous limestone containing numerous crushed graptolites. Successive concretion seams are separated by variable thicknesses of dark gray, grayish orange weathering, platy argillaceous limestone

Size class: microfossils

Preservation: replaced with dolomite

Collection methods: chemical,

Primary reference: J. B. Dunham and M. A. Murphy. 1976. An occurrence of well preserved radiolara from the Upper Ordovician (Caradocian), Eureka County, Nevada. Journal of Paleontology 50(5):882-887 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13495: authorized by Steven Holland, entered by Tori Hanson on 05.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
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Radiolaria indet.