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Richard G Roberts

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Full-Text Articles in Medicine and Health Sciences

Archaeology And Age Of A New Hominin From Flores, In Eastern Indonesia, Michael Morwood, R Soejono, Richard Roberts, T. Sutikna, Christian Turney, Kira Westaway, W Rink, Jian-Xin Zhao, Gerrit Van Den Bergh, Rokhus Awe Due, Douglas Hobbs, M Moore, M Bird, L Fifield Mar 2013

Archaeology And Age Of A New Hominin From Flores, In Eastern Indonesia, Michael Morwood, R Soejono, Richard Roberts, T. Sutikna, Christian Turney, Kira Westaway, W Rink, Jian-Xin Zhao, Gerrit Van Den Bergh, Rokhus Awe Due, Douglas Hobbs, M Moore, M Bird, L Fifield

Richard G Roberts

Excavations at Liang Bua, a large limestone cave on the island of Flores in eastern Indonesia, have yielded evidence for a population of tiny hominins, sufficiently distinct anatomically to be assigned to a new species, Homo floresiensis1. The finds comprise the cranial and some post-cranial remains of one individual, as well as a premolar from another individual in older deposits. Here we describe their context, implications and the remaining archaeological uncertainties. Dating by radiocarbon (14C), luminescence, uranium-series and electron spin resonance (ESR) methods indicates that H. floresiensis existed from before 38,000 years ago (kyr) until at …


Sources Of Overdispersion In A K-Rich Feldspar Sample From North-Central India: Insights From De, K Content And Irsl Age Distributions For Individual Grains, C Neudorf, Richard Roberts, Z Jacobs Mar 2013

Sources Of Overdispersion In A K-Rich Feldspar Sample From North-Central India: Insights From De, K Content And Irsl Age Distributions For Individual Grains, C Neudorf, Richard Roberts, Z Jacobs

Richard G Roberts

Luminescence dating of individual sand-sized grains of quartz is a well-established technique in Quaternary geochronology, but the most ubiquitous mineral on the surface of the Earth—feldspar—has received much less attention at the single-grain level. In this study, we estimated single-grain equivalent dose values and infrared stimulated luminescence (IRSL) ages for K-rich feldspar (KF) grains from a fluvial sample underlying Youngest Toba Tuff (YTT) deposits in north-central India, and compared these ages (corrected for anomalous fading) with those obtained from individual grains of quartz from the same sample. Both minerals have broadly similar single-grain age distributions, but both are greatly overdispersed …


Mid-Holocene Age Obtained For Nested Diamond Pattern Petroglyph In The Billasurgam Cave Complex, Kurnool District, Southern India, Paul S.C Tacon, Nicole Boivin, Michael Petraglia, James Blinkhorn, Allan Chivas, Richard G. Roberts, David Fink, Thomas Higham, Peter Ditchfield, Ravi Korisettar, Jian-Xin Zhao Mar 2013

Mid-Holocene Age Obtained For Nested Diamond Pattern Petroglyph In The Billasurgam Cave Complex, Kurnool District, Southern India, Paul S.C Tacon, Nicole Boivin, Michael Petraglia, James Blinkhorn, Allan Chivas, Richard G. Roberts, David Fink, Thomas Higham, Peter Ditchfield, Ravi Korisettar, Jian-Xin Zhao

Richard G Roberts

India has one of the world's largest and most significant bodies of rock paintings and engravings, yet not a single rock art site or image has been directly and accurately dated using radiometric techniques. Here we report on results from the Billasurgam Cave complex near Kurnool in southern India. Although this cave complex has been investigated archaeologically since the late 1800s, it was not until 2008 that a large petroglyph, consisting of the remains of three nested diamond designs on a stalactite, was noted. In order to determine if this petroglyph had been made recently, flowstone was sampled from on …


Optical Dating Of Quartz Sediments And Accelerator Mass Spectrometry 14c Dating Of Bone Gelatin And Moa Eggshell: A Comparison Of Age Estimates For Non-Archaeological Deposits In New Zealand, Richard Holdaway, Richard Roberts, Nancy Beavan-Athfield, Jon M Olley, Trevor Worthy Mar 2013

Optical Dating Of Quartz Sediments And Accelerator Mass Spectrometry 14c Dating Of Bone Gelatin And Moa Eggshell: A Comparison Of Age Estimates For Non-Archaeological Deposits In New Zealand, Richard Holdaway, Richard Roberts, Nancy Beavan-Athfield, Jon M Olley, Trevor Worthy

Richard G Roberts

No abstract provided.