Locality 12, Punta Colnett - Beal (1948) (Eocene of Mexico)

Also known as Loc. 12

Where: Baja California Sur, Mexico (31.1° N, 116.2° W: paleocoordinates 30.1° N, 105.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tepetate Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• Paleocene and Eocene series are named the Tepetate Formation in Baja California. The strata probably underlie a large part of the region covered by latter rocks, the uppermost beds lapping over the edges of the older formations and lying on the granite of the main range. Determined to be upper Eocene (Tejon faunal similarities) by Gardner.

• bed-level stratigraphic resolution

Environment/lithology: deltaic; fine-grained, yellow siltstone and sandstone

• The formation shows strong evidence of being a delta and near-shore deposit.
• In many places it is composed largely of fine yellow silt and contains sandstone beds with mammoth cross-bedding.

Size class: macrofossils

Collection methods: quarrying,

• Collected by Darton. Collection studied and determined by J. Gardner. No known repository.

Primary reference: C. H. Beal. 1948. Reconnaissance of the geology and oil possibilities of Baja California, Mexico. Geological Society of America Memoir 31 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 43760: authorized by Austin Hendy, entered by Austin Hendy on 25.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Representative.
Bivalvia
 Cardiida - Cardiidae
"Cardium cf. quadragenarium" = Dallocardia quadragenarium
"Cardium cf. quadragenarium" = Dallocardia quadragenarium Conrad 1837 cockle
Gastropoda
 Trochoidea - Trochidae
"Omphalius sp." = Chlorostoma (Omphalius)
"Omphalius sp." = Chlorostoma (Omphalius) Philippi 1847 top snail