Earth:Las Tetas de Cabra Formation

Short description: Geological formation in Baja California, Mexico

Las Tetas de Cabra Formation Stratigraphic range: Wasatchian ~55.8–50 Ma PreЄ Є O S D C P T J K Pg N
Type	Formation
Lithology
Primary	Sandstone
Other	Siltstone
Location
Coordinates
Paleocoordinates	[ ⚑ ] 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.

Fossil content

The following fossils have been reported from the formation:

Mammals

Acreodi

• Dissacus sp.
• Wyolestes iglesius

Artiodactyls

• Diacodexis cf. gracilis

Cimolesta

• cf. Esthonyx sp.

Didelphimorphia

• Esteslestes ensis

Ferae

• cf. Oxyaena sp.

Glires

• ?Paramyidae indet.

Hyaenodonta

• Prolimnocyon sp.

Pantodonta

• Caenolambda jepseni

Perissodactyls

• Eohippus cf. angustidens

Placentalia

• Ectocion ignotum
• Meniscotherium chamense
• Phenacodus vortmani
• cf. Hyopsodus sp.

Theriiformes

• Ferae indet.

Reptiles

• cf. Saniwa sp.
• Boidae indet.
• Iguanidae indet.

Amphibians

• Caudata indet.

Fish

• cf. Galeorhinus sp.

Invertebrates

Gastropods

• Gastropoda indet.

Flora

• Celtis sp.
• Chenopodiaceae indet.
• Heliantheae indet.
• Ulmaceae indet.

Wasatchian correlations

Wasatchian correlations in North America

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	14px	14px					14px														14px
Coryphodon	14px	14px		14px			14px	14px					14px		14px		14px			14px	14px
Diacodexis	14px	14px			14px		14px	14px								14px					14px
Homogalax	14px	14px		14px			14px	14px						14px						14px
Oxyaena	14px	14px					14px									14px					14px
Paramys	14px	14px		14px	14px		14px	14px					14px				14px				14px
Primates	10px			10px			10px						10px				10px			10px	10px
Birds	10px								10px	10px			10px	10px
Reptiles	10px		10px					10px					10px	10px		10px					10px
Fish	10px		10px					10px		10px			10px	10px		10px
Insects								10px	10px	10px	10px	10px						10px
Flora	10px					10px	10px	10px	10px	10px				10px		10px		10px
Environments	Alluvial-fluvio-lacustrine	Fluvial				Fluvial	Fluvio-lacustrine	Fluvial	Lacustrine		Fluvio-lacustrine		Deltaic-paludal	Shallow marine		Fluvial	Shallow marine	Fluvial		Fluvial		Wasatchian volcanoclastics 8px 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

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.