Las Tetas de Cabra Formation

Las Tetas de Cabra Formation
Stratigraphic range: Wasatchian
~55.8–50 Ma

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Las Tetas de Cabra Formation; Stratigraphic range: Wasatchian; ~55.8–50 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Lithology
Primary	Sandstone
Other	Siltstone
Location
Coordinates	28.7°N 114.1°W
Approximate paleocoordinates	31.1°N 97.0°W
Region	Baja California
Country	Mexico
Type section
Named for	Loma las Tetas de Cabra
	Las Tetas de Cabra Formation (Mexico)

The Las Tetas de Cabra Formation is a geologic formation in Mexico. It preserves fossils dating back to the Wasatchian of the Early Eocene period.[1]

Fossil content

The following fossils have been reported from the formation:[1]

Mammals

Acreodi

Dissacus sp.[2]
Wyolestes iglesius[3]

Artiodactyls

Diacodexis cf. gracilis[3]

Cimolesta

cf. Esthonyx sp.[4]

Didelphimorphia

Esteslestes ensis[3]

Ferae

cf. Oxyaena sp.[5]

Glires

?Paramyidae indet.[5]

Hyaenodonta

Prolimnocyon sp.[5]

Pantodonta

Caenolambda jepseni[6]

Perissodactyls

Eohippus cf. angustidens[4]

Placentalia

Theriiformes

Ferae indet.[3]

Reptiles

Amphibians

Caudata indet.[5]

Fish

cf. Galeorhinus sp.[5]

Invertebrates

Gastropods

Gastropoda indet.[5]

Flora

Wasatchian correlations

Wasatchian correlations in North America
Formation	Wasatch	DeBeque	Claron	Indian Meadows	Pass Peak	Tatman	Willwood	Golden Valley	Coldwater	Allenby	Kamloops	Ootsa Lake	Margaret	Nanjemoy	Hatchetigbee	Tetas de Cabra	Hannold Hill	Coalmont	Cuchara	Galisteo	San Jose	Ypresian (IUCS) • Itaboraian (SALMA) Bumbanian (ALMA) • Mangaorapan (NZ)
Basin	Powder River Uinta Piceance Colorado Plateau Wind River Green River Bighorn	Piceance	Colorado Plateau	Wind River	Green River	Bighorn		Williston	Okanagan	Princeton	Buck Creek	Nechako	Sverdrup	Potomac	GoM	Laguna Salada	Rio Grande	North Park	Raton	Galisteo	San Juan	Las Tetas de Cabra Formation (North America)
Country	United States								Canada					United States		Mexico	United States
Copelemur
Coryphodon
Diacodexis
Homogalax
Oxyaena
Paramys
Primates
Birds
Reptiles
Fish
Insects
Flora
Environments	Alluvial-fluvio-lacustrine	Fluvial				Fluvial	Fluvio-lacustrine	Fluvial	Lacustrine		Fluvio-lacustrine		Deltaic-paludal	Shallow marine		Fluvial	Shallow marine	Fluvial		Fluvial		Wasatchian volcanoclastics Wasatchian fauna Wasatchian flora
Volcanic	Yes	No							Yes	No	Yes	No	Yes	No						Yes	No

References

Las Tetas de Cabra Formation at Fossilworks.org
Alroy, 2002
Novacek et al. 1991
Morris, 1966
Novacek et al., 1987
Lucas, 1998

Bibliography

Alroy, J. 2002. Synonymies and reidentifications of North American fossil mammals, .. _.
Froehlich, D. J. 2002. Quo vadis Eohippus? The systematics and taxonomy of the early Eocene equids (Perissodactyla). Zoological Journal of the Linnean Society 134. 141–256.
Lucas, S. G. 1998. Fossil mammals and the Paleocene/Eocene series boundary in Europe, North America, and Asia, 451–500. M.-P. Aubry, S. G. Lucas and W. A. Berggren (eds.), Late Paleocene–Early Eocene Biotic and Climatic Events in the Marine and Terrestrial Records.
Novacek, M. J.; I. Ferrusquía Villafranca; J. J. Flynn; A. R. Wyss, and M. A. Norell. 1991. Wasatchian (early Eocene) mammals and other vertebrates from Baja California, Mexico : the Lomas Las Tetas de Cabra fauna. Bulletin of the American Museum of Natural History 208. 1–88.
Novacek, M. J.; J. J. Flynn; I. Ferrusquia Villafranca, and R. M. Cipolletti. 1987. An early Eocene (Wasatchian) mammal fauna from Baja California. National Geographic Research 3. 376–388.
Morris, W. J. 1966. Fossil mammals from Baja California: new evidence on early Tertiary migrations. Science 153. 1376–1378.

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[FW-1] Las Tetas de Cabra Formation at Fossilworks.org

[Alroy2002-2] Alroy, 2002

[Novacek1991-3] Novacek et al. 1991

[Morris1966-4] Morris, 1966

[Novacek1987-5] Novacek et al., 1987

[Lucas1998-6] Lucas, 1998