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United States Geological Survey: Staff Publications

2015

Uranium-series dating

Articles 1 - 2 of 2

Full-Text Articles in Physical Sciences and Mathematics

Uranium-Series Ages Of Fossil Corals From Mallorca, Spain: The “Neotyrrhenian” High Stand Of The Mediterranean Sea Revisited, Daniel R. Muhs, Kathleen R. Simmons, Joaquín Meco, Naomi Porat Jan 2015

Uranium-Series Ages Of Fossil Corals From Mallorca, Spain: The “Neotyrrhenian” High Stand Of The Mediterranean Sea Revisited, Daniel R. Muhs, Kathleen R. Simmons, Joaquín Meco, Naomi Porat

United States Geological Survey: Staff Publications

The emergent marine deposits of the Mediterranean basin have been recognized as an important record of Quaternary sea level history for more than a century. Previous workers identified what have been interpreted to be two separate high stands of sea in the late Quaternary, namely the “Eutyrrhenian” (thought to be ~120 ka) and the “Neotyrrhenian” (thought to be either ~100 ka or ~80 ka). On Mallorca, Spain, both of these named deposits lie close to present sea level, implying paleo-sea levels slightly above present during both marine isotope stages (MIS) 5.5/5e and either 5.3/5c or 5.1/5a. If these interpretations are …


Late Quaternary Sea-Level History And The Antiquity Of Mammoths (Mammuthus Exilis And Mammuthus Columbi), Channel Islands National Park, California, Usa, Daniel R. Muhs, Kathleen R. Simmons, Lindsey T. Groves, John Mcgeehin, R. Randall Schumann, Larry D. Agenbroad Jan 2015

Late Quaternary Sea-Level History And The Antiquity Of Mammoths (Mammuthus Exilis And Mammuthus Columbi), Channel Islands National Park, California, Usa, Daniel R. Muhs, Kathleen R. Simmons, Lindsey T. Groves, John Mcgeehin, R. Randall Schumann, Larry D. Agenbroad

United States Geological Survey: Staff Publications

Fossils of Columbian mammoths (Mammuthus columbi) and pygmymammoths (Mammuthus exilis) have been reported from Channel Islands National Park, California. Most date to the last glacial period (Marine Isotope Stage [MIS] 2), but a tusk of M. exilis (or immature M. columbi) was found in the lowest marine terrace of Santa Rosa Island. Uranium-series dating of corals yielded ages from 83.8 ± 0.6 ka to 78.6 ± 0.5 ka, correlating the terrace withMIS 5.1, a time of relatively high sea level.Mammoths likely immigrated to the islands by swimming during the glacial periodsMIS 6 (~150 ka) orMIS 8 (~250 ka),when sea levelwas …