Search Results - "Sharp, Warren D."

Chronology of the Acheulean to Middle Stone Age transition in eastern Africa by Deino, Alan L, Behrensmeyer, Anna K, Brooks, Alison S, Yellen, John E, Sharp, Warren D, Potts, Richard

“…The origin of the Middle Stone Age (MSA) marks the transition from a highly persistent mode of stone toolmaking, the Acheulean, to a period of increasing…”
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50-Ma Initiation of Hawaiian-Emperor Bend Records Major Change in Pacific Plate Motion by Sharp, Warren D, Clague, David A

“…The Hawaiian-Emperor bend has played a prominent yet controversial role in deciphering past Pacific plate motions and the tempo of plate motion change. New…”
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Climate response to the 8.2 ka event in coastal California by Oster, Jessica L., Sharp, Warren D., Covey, Aaron K., Gibson, Jansen, Rogers, Bruce, Mix, Hari

“…A fast-growing stalagmite from the central California coast provides a high-resolution record of climatic changes synchronous with global perturbations…”
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Controls on Speleothem Initial 234U/238U Ratios in a Monsoon Climate by Oster, Jessica L., Ronay, Elli R., Sharp, Warren D., Breitenbach, Sebastian F. M., Furbish, David J.

“…Speleothem initial uranium isotope ratios ((234U/238U)i) can be influenced by processes along the seepage water flow‐path including alpha‐recoil into porewater…”
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Northeast Indian stalagmite records Pacific decadal climate change: Implications for moisture transport and drought in India by Myers, Christopher G., Oster, Jessica L., Sharp, Warren D., Bennartz, Ralf, Kelley, Neil P., Covey, Aaron K., Breitenbach, Sebastian F.M.

“…Two types of El Niño events are distinguished by sea surface temperature (SST) anomalies centered in the central or eastern equatorial Pacific. The Central…”
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Insolation-driven changes in atmospheric circulation over the past 116,000 years in subtropical Brazil by Cruz, Francisco W, Burns, Stephen J, Karmann, Ivo, Sharp, Warren D, Vuille, Mathias, Cardoso, Andrea O, Ferrari, José A, Silva Dias, Pedro L, Viana, Oduvaldo

“…During the last glacial period, large millennial-scale temperature oscillations-the 'Dansgaard/Oeschger' cycles-were the primary climate signal in Northern…”
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Evidence of rainfall variations in Southern Brazil from trace element ratios (Mg/Ca and Sr/Ca) in a Late Pleistocene stalagmite by Cruz, Francisco W., Burns, Stephen J., Jercinovic, Michael, Karmann, Ivo, Sharp, Warren D., Vuille, Mathias

“…Trace element ratios in the Bt2 stalagmite from Botuverá cave, Southern Brazil, are explored as a proxy for changes in the local rainfall recharge during the…”
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Pedothem carbonates reveal anomalous North American atmospheric circulation 70,000–55,000 years ago by Oerter, Erik J., Sharp, Warren D., Oster, Jessica L., Ebeling, Angela, Valley, John W., Kozdon, Reinhard, Orland, Ian J., Hellstrom, John, Woodhead, Jon D., Hergt, Janet M., Chadwick, Oliver A., Amundson, Ronald

“…Our understanding of climatic conditions, and therefore forcing factors, in North America during the past two glacial cycles is limited in part by the scarcity…”
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Late Pleistocene California droughts during deglaciation and Arctic warming by Oster, Jessica L., Montañez, Isabel P., Sharp, Warren D., Cooper, Kari M.

“…Recent studies document the synchronous nature of shifts in North Atlantic regional climate, the intensity of the East Asian monsoon, and productivity and…”
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Early, intensive marine resource exploitation by Middle Stone Age humans at Ysterfontein 1 rockshelter, South Africa by Niespolo, Elizabeth M., Sharp, Warren D., Avery, Graham, Dawson, Todd E.

“…Modern human behavioral innovations from the Middle Stone Age (MSA) include the earliest indicators of full coastal adaptation evidenced by shell middens, yet…”
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Holocene geologic slip rate for the Banning strand of the southern San Andreas Fault, southern California by Gold, Peter O., Behr, Whitney M., Rood, Dylan, Sharp, Warren D., Rockwell, Thomas K., Kendrick, Katherine, Salin, Aaron

“…Northwest directed slip from the southern San Andreas Fault is transferred to the Mission Creek, Banning, and Garnet Hill fault strands in the northwestern…”
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Using fill terraces to understand incision rates and evolution of the Colorado River in eastern Grand Canyon, Arizona by Pederson, Joel L., Anders, Matt D., Rittenhour, Tammy M., Sharp, Warren D., Gosse, John C., Karlstrom, Karl E.

“…The incision and aggradation of the Colorado River in eastern Grand Canyon through middle to late Quaternary time can be traced in detail using well‐exposed…”
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Comment on "The earliest modern humans outside Africa" by Sharp, Warren D, Paces, James B

“…Hershkovitz (Reports, 26 January 2018, p. 456) interpreted the Misliya-1 fossil maxilla as evidence of the earliest known anatomically modern human outside…”
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Reading a 400,000-year record of earthquake frequency for an intraplate fault by Williams, Randolph T., Goodwin, Laurel B., Sharp, Warren D., Mozley, Peter S.

“…Our understanding of the frequency of large earthquakes at timescales longer than instrumental and historical records is based mostly on paleoseismic studies…”
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REPLY TO KLEIN: Ysterfontein 1 shell midden (South Africa) and the antiquity of coastal adaptation by Niespolo, Elizabeth M., Sharp, Warren D., Avery, Graham, Dawson, Todd E.

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U‐Th Dating of Syntectonic Calcite Veins Reveals the Dynamic Nature of Fracture Cementation and Healing in Faults by Williams, Randolph T., Mozley, Peter S., Sharp, Warren D., Goodwin, Laurel B.

“…Fracture cementation is an important control on the recovery of prefailure levels of permeability and strength in faults. The timescales of this process,…”
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Rapid evolution of ritual architecture in central Polynesia indicated by precise ²³⁰Th/U coral dating by Sharp, Warren D, Kahn, Jennifer G, Polito, Christina M, Kirch, Patrick V

“…In Polynesia, the complex Society Islands chiefdoms constructed elaborate temples (marae), some of which reached monumental proportions and were associated…”
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THE "PĀNĀNĀ" OR 'SIGHTING WALL' AT HANAMAULOA, KAHIKINUI, MAUI: ARCHAEOLOGICAL INVESTIGATION OF A POSSIBLE NAVIGATIONAL MONUMENT by KIRCH, PATRICK V., RUGGLES, CLIVE, SHARP, WARREN D.

“…A unique stone monument consisting of a notched, linear wall and associated features, situated at Hanamauloa in Kahikinui District, Maui Island, is interpreted…”
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Rates of late Quaternary normal faulting in central Tibet from U-series dating of pedogenic carbonate in displaced fluvial gravel deposits by Blisniuk, Peter M, Sharp, Warren D

“…Along the main boundary fault of the central Tibetan Shuang Hu graben, two well-preserved fluvial terrace surfaces are vertically offset by ~1.3 m (terrace I)…”
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A revised position for the primary strand of the Pleistocene-Holocene San Andreas fault in southern California by Blisniuk, Kimberly, Scharer, Katherine, Sharp, Warren D, Burgmann, Roland, Amos, Colin, Rymer, Michael

“…The San Andreas fault has the highest calculated time-dependent probability for large-magnitude earthquakes in southern California. However, where the fault is…”
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