Locality 15, San Ignacio - Beal (1948) (Paleocene of Mexico)

Also known as Loc. 15

Where: Baja California Sur, Mexico (28.9° N, 114.0° W: paleocoordinates 32.9° N, 93.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tepetate Formation, Paleocene (66.0 - 56.0 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. Unclear whether Paleocene (Smith's suggestion that the fauna is similar to the Martinez), or Eocene (Stewart's opinion). Paleocene chosen by enterer for consistency.

• 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 Smith. Collection studied and determined by Smith and R. Stewart. 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 43755: authorized by Austin Hendy, entered by Austin Hendy on 25.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Representative.
Bivalvia
 Arcida - Glycymerididae
"Glycymeris veatchii" = Axinaea veatchii
"Glycymeris veatchii" = Axinaea veatchii Gabb 1864 clam
 Cardiida - Tellinidae
Tellina perrini Dickerson 1914 tellin clam
Gastropoda
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Naticoidea - Naticidae
"Amauropsis cf. alveata" = Amaurellina moragai
"Amauropsis cf. alveata" = Amaurellina moragai Stewart 1927 moon snail
 Calyptraeoidea - Calyptraeidae
Galerus excentricus Gabb 1864 slipper shell
 Xenophoroidea - Xenophoridae
Xenophora zitteli Weaver 1905 carrier shell
Anthozoa
 Scleractinia - Guyniidae
"Trochocyathus zitteli" = Palaeopsammia zitteli
"Trochocyathus zitteli" = Palaeopsammia zitteli Vaughan 1900 stony coral