Stanford locality 2691, ridge east of Santa Ynez Canyon (Paleocene of the United States)

Where: Los Angeles County, California (34.1° N, 118.6° W: paleocoordinates 38.3° N, 98.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Selandian (61.6 - 59.2 Ma)

• Correlated with the lower "Martinez" on the basis of mollusks by Compton. Assigned to Selandian because of the presence of Mesalia martinezensis and Turritella pachecoensis, based on ages in Squires & Saul (2007).

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, gray, calcareous sandstone

• Gray calcareous sandstone. Described as "friable"

Size class: macrofossils

Collected by R.R Compton in 1941; reposited in the CAS

Primary reference: R. R. Compton. 1944. A new Paleocene gastropod from southern California. Journal of Paleontology 18:464-469 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 205398: authorized by Matthew Clapham, entered by Matthew Clapham on 14.10.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
Nanonavis sp. Stewart 1930 clam
 Arcida - Cucullaeidae
Cucullaea mathewsonii Gabb 1864 clam
 Mytilida - Mytilidae
Brachidontes lawsoni Nelson 1925 mussel
 Carditida - Crassatellidae
"Crassatellites" branneri Waring 1914 clam
 Cardiida - Veneridae
Callocardia sinedepressa Nelson 1925 venus clam
"Macrocallista" stantoni Waring 1917 venus clam
 Cardiida - Tellinidae
"? Tellina undulifera" = Saulella undulifera
"? Tellina undulifera" = Saulella undulifera Gabb 1868 tellin clam
Gastropoda
 Neogastropoda - Volutidae
Retipirula crassitesta Gabb 1868 volute
 Neogastropoda - Tudiclidae
Heteroterma gabbi Stanton 1896 snail
 Stromboidea - Strombidae
"Fusus" ? flexuosus Gabb 1864 true conch
 Ficoidea - Ficidae
Priscoficus caudatus Gabb 1868 fig shell
 Naticoidea - Naticidae
Neverita sp., "Amaurellina martinezensis" = Amauropsis martinezensis
Neverita sp. Risso 1826 moon snail
"Amaurellina martinezensis" = Amauropsis martinezensis Dickerson 1914 moon snail
 Sorbeoconcha - Turritellidae
Mesalia martinezensis Gabb 1868 turret shell
Turritella pachecoensis Stanton 1896 turret shell
 Sorbeoconcha - Cerithiidae
Serratocerithium usanium n. sp. Compton 1944 cerith snail