CAS 39411, Rancho el Refugio (Pliocene of Mexico)

Where: Baja California Sur, Mexico (24.8° N, 111.7° W: paleocoordinates 24.6° N, 110.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pliocene (5.3 - 2.6 Ma)

• STRATIGRAPHIC RELATIONS: From unknown lithostratigraphic unit; mapped as Ysidro Fm, but also referred to as Salada Fm; not resolved by enterer. AGE: Middle Pliocene, on the basis of macrofossil biostratigraphy. STRATIGRAPHIC POSITION: From silty and sandy beds from unknown position within sequence.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified siltstone and poorly lithified sandstone

• SPECIFIC LITHOLOGY: Silty and sandy beds. LITHIFICATION: Poorly-lithified, on the basis of comments in text.

Size class: macrofossils

• COMPONENTS: Whale bones are scattered.

Preservation: original calcite

Reposited in the CAS

Collection methods: surface (in situ),

• COLLECTORS: Multiple collectors from the CAS. REPOSITORY: CAS

Primary reference: L. G. Hertlein. 1966. Pliocene fossils from Rancho El Refugio, Baja California and Cerralvo Island, Mexico. Proceedings of the California Academy of Sciences 30(14):265-284 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96576: authorized by Austin Hendy, entered by Austin Hendy on 13.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for molluscs; whale bones mentioned but not identified. NOMENCLATURE: Authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications.
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula cf. arenata slipper shell
 Cerithioidea - Turritellidae
Turritella cf. gonostoma Valenciennes 1832 turret shell
 Neogastropoda - Fasciolariidae
Fusinus sp. Rafinesque 1815 snail
 Sorbeoconcha - Tonnidae
Malea ringenss tun shell