Silverado Canyon Eriphyla-Volutoderma Association (Cretaceous to of the United States)

Also known as Locality 15

Where: Orange County, California (33.8° N, 117.7° W: paleocoordinates 35.8° N, 82.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Holz Shale Member (Ladd Formation), Turonian to Turonian (93.9 - 83.6 Ma)

• from "about 1 m of strata"

• group of beds-level stratigraphic resolution

Environment/lithology: interdistributary bay; lithified siltstone and lithified shale

• "in marginal marine waters at shallow depths (20 m or less if marine grasses were present)"

•the Holz Shale in general is "in a shallow marine setting, including prodelta, lagoonal and bay environments"

• "Brown to gray siltstone and shale with interbedded lenses of stringers of limestone, conglomerate, and sandstone"

•apparently well lithified because strata were "broken" and "disarticulated" during collection

Size class: macrofossils

Collection methods: bulk, surface (in situ),

• "Bulk samples were collected... and brought back to the lab for disarticulation" but there was also "selective collecting, by breaking the strata at the site"

•collections apparently are at the California State University at Fullerton

Primary reference: F. A. Sundberg. 1980. Late Cretaceous paleoecology of the Holz Shale, Orange County, California. Journal of Paleontology 54(4):840-857 [J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 80941: authorized by John Alroy, entered by John Alroy on 21.05.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Neogastropoda - Pyropsidae
Pyropsis sp.
Pyropsis sp. Conrad 1860 snail
 Neogastropoda - Volutidae
Volutoderma magna
Volutoderma magna Packard 1922 volute
 Sorbeoconcha - Aporrhaidae
"Alaria nodosa" = Latiala nodosa
"Alaria nodosa" = Latiala nodosa Packard 1922 snail
Bivalvia
 Ostreida - Ostreidae
"Pseudoperna taxidonta" = Ostrea taxidonta
"Pseudoperna taxidonta" = Ostrea taxidonta Packard 1922 oyster
 Arcida - Parallelodontidae
Parallelodon sp.
Parallelodon sp. Meek and Worthen 1866 clam
"sp. A"
 Carditida - Astartidae
Eriphyla sp.
Eriphyla sp. Gabb 1864 clam