ammonites
USGS 28172-PC (Carboniferous to of the United States)

Where: Eureka County, Nevada (39.2° N, 116.3° W: paleocoordinates 8.9° S, 52.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Siphonodella isosticha - S. Crenulata zone, Davis Spring Formation, Kinderhookian to Kinderhookian (360.7 - 345.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, dolomitic, black, gray, cherty/siliceous siltstone and shale

• from dolomitic siltstone and siliceous shale underlying 19 ft of gray black platy siltstone and dark shale weathering gray.

Reposited in the USGS

Primary reference: M. Gordon, Jr. 1986. Late Kinderhookian (Early Mississippian) ammonoids of the western United States. Journal of Paleontology 60(Supplement):1-36 [J. Alroy/M. Sommers/J. Alroy] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6239: authorized by John Alroy, entered by Mike Sommers on 09.02.2000

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)