ammonites
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Thetford Center (Holocene of the United States)

Where: Genesee County, Michigan (43.2° N, 83.6° W: paleocoordinates 43.2° N, 83.6° W)

• coordinate estimated from map

When: Holocene (0.0 - 0.0 Ma)

• bone radiocarbon dated at 720 +- 70 B.P.

Environment/lithology: lacustrine - large; unlithified sandstone

Size class: macrofossils

Preservation: original phosphate, anthropogenic

Reposited in the UMMP

Collection methods: salvage, quarrying

Primary reference: C. E. Harington. 1977. Marine mammals in the Champlain Sea and the Great Lakes. Annals of the New York Academy of Sciences 288:508-537 [M. Uhen/M. Uhen] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 51031: authorized by Mark Uhen, entered by Mark Uhen on 26.05.2005