ammonites
USNM 18125, cl. 3 (Ordovician of the United States)

Where: Siskyou County, California (41.4° N, 122.7° W: paleocoordinates 0.7° S, 78.9° W)

• outcrop-level geographic resolution

When: 3 Member (Kangaroo Creek Formation), Llandeilian (466.0 - 460.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified conglomerate and limestone

• Carbonate with limestone clasts

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: bulk, hydrochloric

Primary reference: A. W. Potter. 1990. Middle and Late Ordovician brachiopods from the eastern Klamath Mountains, northern California. Palaeontographica Abteilung A 212(1-6):31-158 [A. Miller/S. Kolbe] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100595: authorized by Arnold Miller, entered by Sarah Kolbe on 11.12.2010