ammonites
USNM 18137, cl. P-1. Side of major hill. Ordovician clasts (Ordovician of the United States)

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

• local area-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

• Roundstone polymicitic conglomerate 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 100633: authorized by Arnold Miller, entered by Sarah Kolbe on 11.12.2010