USGS Cenozoic M1930 Indian Valley (Miocene of the United States)

Also known as UCMP IP6935

Where: Monterey County, California (35.9° N, 120.7° W)

• Paleocoordinates: 37.1° N, 118.2° W (Wright 2013)

• coordinate stated in text

When: Pancho Rico Formation, Messinian (7.2 - 5.3 Ma)

• Described in reference as Pliocene. Pancho Rico Formation is Miocene per Addicott 1978 (Geological Survey Bulletin, Issue 1457). AGE: Revised to Messian consistent with EPICC stratigraphic revision [A. Hendy, 06/2020].

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collected by D. L Durham in 1963

Primary reference: D. L. Durham and W. O. Addicott. 1965. Pancho Rico Formation, Salinas Valley. United States Geological Survey Professional Paper 524(A):A1-A22 [P. Holroyd/S. Tremblay]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 194892: authorized by Patricia Holroyd, entered by Susan Tremblay on 06.07.2018

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Carditida - Carditidae
Cyclocardia sp.
Cyclocardia sp. Conrad 1867 clam
 Cardiida - Tellinidae
? Macoma nasuta, "Florimetis biangulata" = Leporimetis obesa
? Macoma nasuta Conrad 1837 bent-nose clam
"Florimetis biangulata" = Leporimetis obesa Deshayes 1855 yellow apolymetis
 Ostreida - Ostreidae
"Ostrea atwoodi" = Ostrea (Ostrea) atwoodii
"Ostrea atwoodi" = Ostrea (Ostrea) atwoodii Gabb 1866 oyster
Gastropoda
 Trochoidea - Trochidae
"Calliostoma coalingense" = Calliostoma coalingensis, "Calliostoma etchegoinensis" = Calliostoma ligatum
"Calliostoma coalingense" = Calliostoma coalingensis Arnold 1909 top snail
"Calliostoma etchegoinensis" = Calliostoma ligatum Gould 1849 blue topsnail
misspelled as "Calliostoma etchegoinense"
 Neogastropoda - Columbellidae
Mitrella gausapata
Mitrella gausapata Gould 1850 shaggy dovesnail
 Neogastropoda - Buccinidae
"? Calicantharus sp." = Cantharus (Calicantharus)
"? Calicantharus sp." = Cantharus (Calicantharus) Clark 1938 true whelk
 Neotaenioglossa - Calyptraeidae
Calyptraea filosa, ? Crepidula cf. princeps, Crucibulum "n. sp. ?"
Calyptraea filosa Gabb 1866 Chinese hat snail
? Crepidula cf. princeps Conrad 1855 slipper shell
Crucibulum "n. sp. ?" Schumacher 1817 slipper shell
 Cerithioidea - Turritellidae
Turritella vanvlecki
Turritella vanvlecki Arnold 1909 turret shell
Thecostraca
 Balanomorpha - Balanidae
Balanus sp.
Balanus sp. Da Costa 1778 barnacle