Where: Madera County, California (36.9° N, 120.3° W: paleocoordinates 36.7° N, 107.9° W)
• coordinate stated in text
• hand sample-level geographic resolution
When: Kreyenhagen Formation, Middle Eocene to Middle Eocene (48.6 - 33.9 Ma)
• Fossils from 3935 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 191006: authorized by Patricia Holroyd, entered by Patricia Holroyd on 03.01.2018
Creative Commons license: CC BY (attribution)
Taxonomic list
Actinopteri | |
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Kreyenhagenius joaquinensis n. gen. n. sp.
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Praescomberesox pacificus n. gen. n. sp.
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"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus
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Osteichthyes | |
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Parastenodus gillensis n. gen. n. sp.
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