Silverado Canyon Cerithium-Parallelodon Association (Cretaceous of the United States)

Also known as Locality 14a

Where: Orange County, California (33.8° N, 117.7° W: paleocoordinates 34.7° N, 81.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Holz Shale Member (Ladd Formation), Turonian (93.9 - 89.8 Ma)

• from "about 1 m of strata"

• group of beds-level stratigraphic resolution

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

• "in normal marine waters at shallow depth (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 80936: authorized by John Alroy, entered by John Alroy on 21.05.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Scaphopoda
  -
Dentalium whiteavesi Anderson and Hanna 1935 tusk shell
Bivalvia
 Arcida - Parallelodontidae
Parallelodon sp. Meek and Worthen 1866 clam
"sp. A"
 Arcida - Limopsidae
Limopsis silveradoensis Packard 1922 clam
 Pectinida - Entoliidae
Syncyclonema operculiformis Gabb 1864 scallop
 Carditida - Astartidae
Eriphyla lapidis Packard 1922 clam
 Pholadida - Corbulidae
"Corbula parilis" = Caryocorbula parilis
"Corbula parilis" = Caryocorbula parilis Gabb 1864 clam
Gastropoda
 Trochoidea - Solariellidae
"Margaritella crenulata" = Solariella crenulata
"Margaritella crenulata" = Solariella crenulata Gabb 1864 snail
 Neogastropoda - Fasciolariidae
"Volutoderma jacksonensis" = Drilluta jacksonensis
"Volutoderma jacksonensis" = Drilluta jacksonensis Anderson 1958 snail
 Sorbeoconcha - Aporrhaidae
"Alaria nodosa" = Latiala nodosa
"Alaria nodosa" = Latiala nodosa Packard 1922 snail
 Sorbeoconcha - Cerithiopsidae
"Cerithium alternata" = Cerithiopsis alternata
"Cerithium alternata" = Cerithiopsis alternata Gabb 1864 snail