USGS Mesozoic loc. M2605, Grindstone Creek (Jurassic of the United States)

Where: Glenn County, California (39.7° N, 122.5° W: paleocoordinates 35.7° N, 69.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Buchia aff. B. okensis zone, Tithonian (152.1 - 145.0 Ma)

• Tithonian. Within a few feet of top of Buchia piochii zone just below zone of B. aff. B. okensis.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by D. L. Jones in 1964; reposited in the USNM

Primary reference: D. L. Jones, E. H. Bailey, and R. W. Imlay. 1969. Structural and stratigraphic significance of the Buchia zones in the Colyear Springs-Paskenta Area, California. United States Geological Survey Professional Paper (647-A)A1-A24 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 224832: authorized by Jonathan Marcot, entered by Jonathan Marcot on 06.04.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Buchiidae
Buchia piochii Gabb 1864 scallop
Cephalopoda
 Phylloceratida - Phylloceratidae
? Phylloceras contrarium Imlay and Jones 1970 ammonite
 Ammonitida - Olcostephanidae