CSUN Loc. 1220a [Bateque Fm] (Eocene of Mexico)

Where: Baja California Sur, Mexico (26.8° N, 113.0° W)

• Paleocoordinates: 32.4° N, 88.5° W (Wright 2013)

• 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 sandstone and lithified reef rocks

• note on paleoenvironment...the author's suggest that the "massive large growths of colonial reef corals...grew on the top and/or sides of a shoal caused by the underlying lobe of the braid delta". However, "positive determination of whether or not the reef corals actually constructed a reef cannot be ascertained."
• a very poorly exposed, 7 m thick interval that consists of laminated?, very fine-grained sandstone containing radially oriented or massive large growths of colonial reef corals

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 5495: authorized by Arnold Miller, entered by Karen Layou on 06.10.1999, edited by Wolfgang Kiessling

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Foraminifera
 Nummulitacea - Asterocyclinidae
Pseudophragmina clarki
Florideophyceae
  - Corallinophycidae
Archaeolithothamnium sp.
Archaeolithothamnium sp. Rothpletz 1891
Chlorophyceae
 Dasycladales - Dasycladaceae
Dasycladaceae indet.
Dasycladaceae indet. Kutzing 1843
Gastropoda
 Sorbeoconcha - Campanilidae
Campanile sp.
Campanile sp. Fischer 1884 snail
Bivalvia
 Pectinida - Pectinoidae
Spondylus batequensis
Spondylus batequensis Squires and Demetrion 1990 scallop
 Arcida - Arcidae
"Barbatia (Acar) ? sp." = Acar
"Barbatia (Acar) ? sp." = Acar Gray 1857 miniature ark
Calcarea
 Calcaronea - Stellispongiidae
Elasmostoma bajaensis
Elasmostoma bajaensis Squires and Demetrion 1989 calcareous sponge
Hydrozoa
 Spongiomorphida - Spongiomorphidae
Spongiomorphidae ? indet.
Anthozoa
 Scleractinia - Heterocoeniidae
Heterocoenia ? sp.
Heterocoenia ? sp. Milne-Edwards and Haime 1848 stony coral
 Scleractinia - Stylinidae
"Stylosmilia" ameliae
"Stylosmilia" ameliae Squires and Demetrion 1992 stony coral
 Scleractinia - Mussidae
Colpophyllia nicholasi n. sp.
Colpophyllia nicholasi n. sp. Squires and Demetrion 1992 stony coral
 Scleractinia - Montastraeidae
Montastrea laurae n. sp.
Montastrea laurae n. sp. Squires and Demetrion 1992 stony coral