Where: Madera County, California (35.0° N, 119.3° W: paleocoordinates 34.8° N, 107.0° W)

• coordinate stated in text

When: Kreyenhagen Formation, Middle Eocene to Middle Eocene (47.8 - 33.9 Ma)

• Fossils from 9212 feet and deeper below surface. Age listed in David 1946 as "Eogene" reflecting the author's interpretation of the age of the rocks as late Eocene to potentially early Oligocene. Formation as a whole now regarded as late middle Eocene to Eocene (see chapters in USGS Professional Paper 1713).

Environment/lithology: marine; shale

Size class: mesofossils

Preservation: mold/impression

Primary reference: L. R. David. 1946. Some typical Upper Eocene fish scales from California. Contributions to Paleontology, Carnegie Institute of Washington Publication 551:47-112 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191009: authorized by Patricia Holroyd, entered by Patricia Holroyd on 03.01.2018

Creative Commons license: CC BY (attribution)