CSUN Loc. 1291b [Bateque Fm] (Eocene of Mexico)

Where: Baja California, Mexico (26.7° N, 112.9° W: paleocoordinates 28.9° N, 96.4° W)

• outcrop-level geographic resolution

When: Bateque Formation, Ypresian (56.0 - 47.8 Ma)

• This collection is from section 2 of the author's four section division of the formation.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, bioturbated, shelly/skeletal, yellow sandstone and lithified limestone

• 90 m thick shallow-marine deposit that...consists of bioturbated and parallel-laminated, yellow, very fine-grained sandstone (75%) with many interbedded lenses (25%) filled with abundant macrofossils. lenses are described as poorly sorted coquinas.

Size class: macrofossils

Reposited in the LACM

Primary reference: R. L. Squires and R. A. Demetrion. 1992. Paleontology of the Eocene Bateque Formation, Baja California Sur, Mexico. Contributions in Science (Natural History Museum of Los Angeles County) 434:1-55 [A. Miller/K. Layou]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5502: authorized by Arnold Miller, entered by Karen Layou on 08.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Spatangoida - Schizasteridae
Schizaster sp. Agassiz 1835 heart urchin
Schizaster sp. aff. S. lecontei
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica cognata" = Architectonica (Stellaxis) cognata
"Architectonica cognata" = Architectonica (Stellaxis) cognata Gabb 1864 sundial
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
? T. merriami
Turritella andersoni Dickerson 1916 turret shell
Turritella buwaldana Dickerson 1916 turret shell
Bivalvia
 Ostreida - Gryphaeidae
"Pycnodonte pacifica" = Phygraea pacifica
"Pycnodonte pacifica" = Phygraea pacifica Squires and Demetrion 1990 oyster
Foraminifera
 Nummulitacea - Asterocyclinidae