USGS Cenozoic M1966 Powell Canyon (Miocene of the United States)

Also known as UCMP IP6966, UCMP 3572- (paper incorrectly stated UCMP A3572)

Where: Monterey County, California (36.0° N, 120.7° W: paleocoordinates 35.6° N, 118.8° W)

• 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, W. O. Addicott in 1964

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 195029: authorized by Patricia Holroyd, entered by Susan Tremblay on 12.07.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Neotaenioglossa - Calyptraeidae
Calyptraea filosa Gabb 1866 slipper shell
 Neogastropoda - Siphonaliidae
 Neogastropoda - Nassariidae
Nassarius grammatus Dall 1917 snail
Occurrence in collection from UCMP loc. 3572, which is equivalent to M1966
Bivalvia
 Arcida - Arcidae
Anadara sp. Gray 1847 ark
 Pectinida - Pectinoidae
Lyropecten terminus Arnold 1906 scallop
 Ostreida - Ostreidae
"Ostrea atwoodi" = Ostrea (Ostrea) atwoodii
"Ostrea atwoodi" = Ostrea (Ostrea) atwoodii Gabb 1866 oyster
Field identification.
 Mytilida - Mytilidae
"Modiolus rectus" = Modiolatus rectus
"Modiolus rectus" = Modiolatus rectus Conrad 1837 mussel
 Cardiida - Veneridae
"? Protothaca cf. laciniata" = Leukoma laciniata
"? Protothaca cf. laciniata" = Leukoma laciniata Carpenter 1864 venus clam
subsp. hannibali
 Cardiida - Mactridae
"Spisula hemphilli" = Mactromeris hemphillii
"Spisula hemphilli" = Mactromeris hemphillii Dall 1894 clam
 Cardiida - Cardiidae
"Trachycardium cf. quadragenarium" = Dallocardia quadragenarium
"Trachycardium cf. quadragenarium" = Dallocardia quadragenarium Conrad 1837 cockle
 Cardiida - Tellinidae
"Macoma cf. indentata" = Macoma (Rexithaerus) indentata Carpenter 1864 tellin clam
Macoma nasuta Conrad 1837 tellin clam
 Solenida - Pharidae
"Siliqua cf. media" = Siliqua alta
"Siliqua cf. media" = Siliqua alta Broderip and Sowerby I 1829 clam
Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle
Echinoidea
 Clypeasteroida - Echinarachniidae
Astrodapsis cf. spatiosus Kew 1920 sand dollar