Loc. K-12-35, Ojo de Agua [Indidura Fm] (Cretaceous of Mexico)

Where: Coahuila de Zaragoza, Mexico (29.3° N, 101.1° W: paleocoordinates 28.7° N, 66.6° W)

• outcrop-level geographic resolution

When: Euomphaloceras septemseriatum ammonoid zone, Indidura Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Indidura Fm, which overlies the Aurora Limestone. AGE: Cenomanian, on the basis of biostratigraphic correlation to better dated Texan lithostratigraphic units, and ammonite biostratigraphy. STRATIGRAPHIC POSITION: From outcrop and float along the Coilopeceras [sp.= Coilopoceras] beds.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, gray limestone

• SPECIFIC LITHOLOGY: Thin-bedded, platy, rubbly, and marly gray limestone, weathered buff color. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression

Collected by Kellum; reposited in the UMMP

Collection methods: surface (float),

• COLLECTOR: L. B. Kellum, 1935. REPOSITORY: UMMP.

Primary reference: L. B. Kellum and W. I. Robinson. 1963. Geology of the west-central part of the Sierra de Tlahualilo, Coahuila, Mexico. Papers of the Michigan Academy of Science, Art, and Letters 48:223-261 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 88675: authorized by Austin Hendy, entered by Austin Hendy on 17.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for a range of macroinvertebrates. NOMENCLATURE: Not an authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications.
Cephalopoda
 Ammonitida - Acanthoceratidae
"Metacalycoceras sp." = Calycoceras, "Metoicoceras bosei" = Metoicoceras geslinianum
"Metacalycoceras sp." = Calycoceras Hyatt 1900 ammonite
"Metoicoceras bosei" = Metoicoceras geslinianum d'Orbigny 1841 ammonite
 Ammonitida - Coilopoceratidae
Coilopoceras sp. Hyatt 1903 ammonite
Bivalvia
 Ostreida - Pteriidae
Pteria aguilerae pearl oyster
 Cardiida - Arcticidae