Las Tetas de Cabra Formation

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°42′N114°06′W / 28.7°N 114.1°W / 28.7; -114.1
Approximate paleocoordinates	31°06′N97°00′W / 31.1°N 97.0°W / 31.1; -97.0
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

• Ectocion ignotum ^[3]
• Meniscotherium chamense ^[6]
• Phenacodus vortmani ^[5]
• cf. Hyopsodus sp. ^[5]

Theriiformes

• Ferae indet. ^[3]

Reptiles

• cf. Saniwa sp. ^[5]
• Boidae indet. ^[5]
• Iguanidae indet. ^[5]

Amphibians

• Caudata indet. ^[5]

Fish

• cf. Galeorhinus sp. ^[5]

Invertebrates

Gastropods

• Gastropoda indet. ^[5]

Flora

• Celtis sp. ^[5]
• Chenopodiaceae indet. ^[5]
• Heliantheae indet. ^[5]
• Ulmaceae indet. ^[5]

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

See also

• List of fossiliferous stratigraphic units in Mexico

References

1. Las Tetas de Cabra Formation at Fossilworks.org
2. Alroy, 2002
3. Novacek et al. 1991
4. Morris, 1966
5. Novacek et al., 1987
6. 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 (2): 141–256, doi:10.1046/j.1096-3642.2002.00005.x
• Lucas, S. G (1998), Fossil mammals and the Paleocene/Eocene series boundary in Europe, North America, and Asia, 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, pp. 451–500
• Novacek, M. J.; Ferrusquía Villafranca, I.; Flynn, J. J.; Wyss, A. R.; Norell, M. A. (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.; Flynn, J. J.; Ferrusquia Villafranca, I.; Cipolletti, R. M. (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 (3742): 1376–1378, Bibcode:1966Sci...153.1376M, doi:10.1126/science.153.3742.1376, PMID   17814386