Journal of Geology
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.
Geological time; Paleomagnetism; Patagonia (Argentina and Chile)
Citation: Pilot Scholars Version (Modified MLA Style)
Marshall, Larry G.; Drake, Robert E.; Curtis, Garniss H.; Butler, Robert F.; Flanagan, Kathy M.; and Naeser, Charles W., "Geochronology of Type Santacrucian (Middle Tertiary) Land Mammal Age, Patagonia, Argentina" (1986). Environmental Studies Faculty Publications and Presentations. Paper 5.