Geochronology of Type Santacrucian (Middle Tertiary) Land Mammal Age, Patagonia, Argentina

Geochronology of Type Santacrucian (Middle Tertiary) Land Mammal Age, Patagonia, Argentina

Mammal-bearing lacustrine and tuffaceous sediments from three localities of the Santa Cruz Formation, type fauna of the Santacrucian Land Mammal Age, in Patagonia, southern Argentina, are calibrated by radioisotope dating with the aid of magnetostratigraphy. The strata range from about 17.6 Ma to pe...

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Veröffentlicht in:J. Geol.; (United States) 1986-07, Vol.94 (4), p.449-457
Hauptverfasser: Marshall, Larry G., Drake, Robert E., Curtis, Garniss H., Butler, Robert F., Flanagan, Kathy M., Naeser, Charles W.
Format: Artikel
Sprache:eng
Schlagworte:
AGE ESTIMATION
ANIMALS
ARGENTINA
CENOZOIC ERA
Demagnetization
DEVELOPING COUNTRIES
Fauna
FOSSILS
Geochronology
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
GEOSCIENCES
ISOTOPE DATING
LATIN AMERICA
Magnetic fields
MAMMALS
Minerals
Plagioclase
SOUTH AMERICA
STRATIGRAPHY
TERTIARY PERIOD
Tuff
VERTEBRATES 580100 > Geology & Hydrology-- (-1989)
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Beschreibung
Zusammenfassung:Mammal-bearing lacustrine and tuffaceous sediments from three localities of the Santa Cruz Formation, type fauna of the Santacrucian Land Mammal Age, in Patagonia, southern Argentina, are calibrated by radioisotope dating with the aid of magnetostratigraphy. The strata range from about 17.6 Ma to perhaps 16.0 Ma, and are thus of late-early Miocene age. The Santacrucian Land Mammal Age ranges from about 18.0 Ma to about 15.0 Ma.
ISSN:0022-1376
1537-5269
DOI:10.1086/629050