Search Results - "Deino, A. L."

40Ar/39Ar dating into the historical realm : Calibration against pliny the younger by RENNE, P. R, SHARP, W. D, DEINO, A. L, ORSI, G, CIVETTA, L

“…Laser incremental heating of sanidine from the pumice deposited by the Plinian eruption of Vesuvius in 79 A.D. yielded a [sup.40.Ar]/[sup.39.Ar] isochron age…”
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East African climate change and orbital forcing during the last 175 kyr BP by Trauth, Martin H., Deino, Alan L., Bergner, Andreas G.N., Strecker, Manfred R.

“…Variations in the temporal and spatial distribution of solar radiation caused by orbital changes provide a partial explanation for the observed long-term…”
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40Ar/39Ar dating of Bed I, Olduvai Gorge, Tanzania, and the chronology of early Pleistocene climate change by Deino, Alan L.

“…40Ar/39Ar dating of tuffs and lavas of the late Pleistocene volcanic and sedimentary sequence of Olduvai Gorge, north-central Tanzania, provides the basis for…”
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High-precision 40Ar/39Ar geochronology and the advent of North America’s Late Cretaceous terrestrial fauna by Cifelli, R L, Kirkland, J I, Weil, A, Deino, A L, Kowallis, B J

“…A densely sampled, diverse new fauna from the uppermost Cedar Mountain Formation, Utah, indicates that the basic pattern of faunal composition for the Late…”
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Chronostratigraphy of the Baringo-Tugen Hills-Barsemoi (HSPDP-BTB13-1A) core – 40Ar/39Ar dating, magnetostratigraphy, tephrostratigraphy, sequence stratigraphy and Bayesian age modeling by Deino, Alan L., Sier, Mark J., Garello, Dominique I., Keller, C. Brenhin, Kingston, John D., Scott, Jennifer J., Dupont-Nivet, Guillaume, Cohen, Andrew S.

“…The Baringo-Tugen Hills-Barsemoi 2013 drillcore (BTB13), acquired as part of the Hominin Sites and Paleolakes Drilling Project, recovered 228 m of…”
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Chronostratigraphy of the Baringo-Tugen-Barsemoi (HSPDP-BTB13-1A) core – 40Ar/39Ar dating, magnetostratigraphy, tephrostratigraphy, sequence stratigraphy and Bayesian age modeling by Deino, A. L., Sier, M. J., Garello, D., Keller, B., Kingston, J., Scott, J., Dupont-Nivet, Guillaume, Cohen, A.

“…The Baringo-Tugen-Barsemoi 2013 drillcore (BTB13), acquired as part of the Hominin Sites and Paleolakes Drilling Project, recovered 228 m of fluviolacustrine…”
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Chronostratigraphic model of a high-resolution drill core record of the past million years from the Koora Basin, south Kenya Rift: Overcoming the difficulties of variable sedimentation rate and hiatuses by Deino, A.L., Dommain, R., Keller, C.B., Potts, R., Behrensmeyer, A.K., Beverly, E.J., King, J., Heil, C.W., Stockhecke, M., Brown, E.T., Moerman, J., deMenocal, P.

“…The Olorgesailie Drilling Project and the related Hominin Sites and Paleolakes Drilling Project in East Africa were initiated to test hypotheses and models…”
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High- and low-latitude forcing of Plio-Pleistocene East African climate and human evolution by Trauth, Martin H., Maslin, Mark A., Deino, Alan L., Strecker, Manfred R., Bergner, Andreas G.N., Dühnforth, Miriam

“…The late Cenozoic climate of East Africa is punctuated by episodes of short, alternating periods of extreme wetness and aridity, superimposed on a regime of…”
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Astronomically forced climate change in the Kenyan Rift Valley 2.7–2.55 Ma: implications for the evolution of early hominin ecosystems by Kingston, John D., Deino, Alan L., Edgar, Robert K., Hill, Andrew

“…Global climate change, linked to astronomical forcing factors, has been implicated in faunal evolutionary change in equatorial Africa, including the origin and…”
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{40}$Ar/$^{39}$Ar Dating into the Historical Realm: Calibration Against Pliny the Younger by Renne, P. R., Sharp, W. D., Deino, A. L., Orsi, G., Civetta, L.

“…Laser incremental heating of sanidine from the pumice deposited by the Plinian eruption of Vesuvius in 79 A.D. yielded a $^{40}$Ar/$^{39}$Ar isochron age of…”
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Geochemical characterization of bentonite beds in the Two Medicine Formation (Campanian, Montana), including a new 40Ar/ 39Ar age by Foreman, B.Z., Rogers, R.R., Deino, A.L., Wirth, K.R., Thole, J.T.

“…Terrestrial deposits of the Upper Cretaceous (Campanian) Two Medicine Formation of northwestern Montana preserve multiple bentonite beds (n ≥ 19) that reflect…”
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The age of the Neapolitan Yellow Tuff caldera-forming eruption (Campi Flegrei caldera – Italy) assessed by 40Ar/ 39Ar dating method by Deino, Alan L, Orsi, Giovanni, de Vita, Sandro, Piochi, Monica

“…The Neapolitan Yellow Tuff (NYT) is the product of the largest known trachytic phreatoplinian eruption. It covered an area larger than 1000 km 2 with an…”
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Geochronology of age-progressive volcanism of the Oregon High Lava Plains: Implications for the plume interpretation of Yellowstone by Jordan, Brennan T., Grunder, Anita L., Duncan, Robert A., Deino, Alan L.

“…The High Lava Plains province (HLP) is a late Cenozoic bimodal volcanic field at the northern margin of the Basin and Range province in southeastern Oregon…”
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Intercalibration of standards, absolute ages and uncertainties in 40Ar/ 39Ar dating by Renne, Paul R., Swisher, Carl C., Deino, Alan L., Karner, Daniel B., Owens, Thomas L., DePaolo, Donald J.

“…The 40Ar/ 39Ar dating method depends on accurate intercalibration between samples, neutron fluence monitors, and primary 40Ar/ 40K (or other external)…”
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Alder Creek sanidine (ACs-2): A Quaternary 40Ar/ 39Ar dating standard tied to the Cobb Mountain geomagnetic event by Nomade, S., Renne, P.R., Vogel, N., Deino, A.L., Sharp, W.D., Becker, T.A., Jaouni, A.R., Mundil, R.

“…Accurate 40Ar/ 39Ar dating of Quaternary and Holocene samples requires a standard (neutron fluence monitor) of appropriate age. This standard should be…”
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40Ar/39Ar dating of the Kapthurin Formation, Baringo, Kenya by Deino, Alan L., McBrearty, Sally

“…The40Ar/39Ar radiometric dating technique has been applied to tuffs and lavas of the Kapthurin Formation in the Tugen Hills, Kenya Rift Valley. Two variants of…”
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Late Pliocene Homo and Hominid Land Use from Western Olduvai Gorge, Tanzania by Blumenschine, Robert J., Peters, Charles R., Masao, Fidelis T., Clarke, Ronald J., Deino, Alan L., Hay, Richard L., Swisher, Carl C., Stanistreet, Ian G., Ashley, Gail M., McHenry, Lindsay J., Sikes, Nancy E., van der Merwe, Nikolaas J., Tactikos, Joanne C., Cushing, Amy E., Deocampo, Daniel M., Njau, Jackson K., Ebert, James I.

“…Excavation in the previously little-explored western portion of Olduvai Gorge indicates that hominid land use of the eastern paleobasin extended at least…”
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40Ar/ 39Ar age of the Kaiparowits Formation, southern Utah, and correlation of contemporaneous Campanian strata and vertebrate faunas along the margin of the Western Interior Basin by Roberts, Eric M., Deino, Alan L., Chan, Marjorie A.

“…Laser-fusion 40Ar/ 39Ar analysis of four bentonite horizons produces the first absolute ages for the 860-m-thick Kaiparowits Formation and resolves previous…”
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40Ar/39Ar dating of Chemeron Formation strata encompassing the site of hominid KNM-BC 1, Tugen Hills, Kenya by Deino, Alan L., Hill, Andrew

“…A fossil hominid temporal bone (KNM-BC 1) from surface exposures at Baringo Paleontological Research Project site BPRP#2 in the Chemeron Formation outcropping…”
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The Oligocene Lund Tuff, Great Basin, USA: a very large volume monotonous intermediate by Maughan, Larissa L, Christiansen, Eric H, Best, Myron G, Grommé, C.Sherman, Deino, Alan L, Tingey, David G

“…Unusual monotonous intermediate ignimbrites consist of phenocryst-rich dacite that occurs as very large volume (>1000 km 3) deposits that lack systematic…”
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