CAS 38849, 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

• local area-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 multiple beds.

• group of beds-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 96580: 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.
unclassified
  -
Gastropoda
 Neogastropoda - Muricidae
Murex sp. Linnaeus 1758 murex snail
 Stromboidea - Strombidae
Strombus sp. Linnaeus 1758 conch
 Ficoidea - Ficidae
Chondrichthyes
 Lamniformes - Lamnidae
Carcharodon arnoldi Jordan 1898 white shark
 Carchariniformes - Carcharhinidae
? Carcharhinus sp. de Blainville 1816 requiem shark
 Carchariniformes - Hemigaleidae
Hemipristis heteropleurus Agassiz 1844 ground shark
Mammalia
 Cetacea -