Where: California (36.6° N, 121.9° W: paleocoordinates 36.1° N, 119.1° W)
• coordinate based on political unit
When: Canyon del Rey Diatomite Member (Monterey Formation), Tortonian (11.6 - 7.2 Ma)
• early late Miocene according to Demere et al. 2005
•
•The original description states that the “top stratum” of the section in which the specimen was found “is loose and scarcely consolidated, characters which accompany the upper part of the Monterey shale member whenever definitely exposed” [67: 238]. Barron [68] placed a rock sample (CAS 866) from the type locality, collected at the same time as the CAS 1733, into the Canyon del Rey Diatomite Member. Fission-track dating of associated ash layers place the base of this unit at 11.3 ± 0.9 Ma [69]. A second ash horizon from within the Canyon del Rey Diatomite Member has been dated to 8.4 ± 0.8 Ma, but it is unclear whether the holotype was retrieved from above or below this horizon The rock sample (CAS 866) apparently associated with the holotype has yielded the diatom Denticulopsis lauta [68], which last appears around 9–10 Ma [70, 71]. Together, these observations imply an early Tortonian (11.6–9.5 Ma) age for B. ryani. (Marx & Forcye, 2015)
• member-level stratigraphic resolution
Environment/lithology: basinal (); lithified, condensed, diatomaceous shale
Size class: macrofossils
Preservation: original phosphate
Reposited in the CAS
Collection methods: salvage,
Primary reference: G. D. Hanna and M. McLellan. 1924. A new species of whale from the type locality of the Monterey Group. Proceedings of the California Academy of Sciences 13(14):237-241 [M. Uhen/N. Pyenson/N. Pyenson]more details
Purpose of describing collection: taphonomic analysis
PaleoDB collection 45501: authorized by Mark Uhen, entered by Nick Pyenson on 26.10.2004, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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