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Full-Text Articles in Social and Behavioral Sciences
Continuity Of Mammalian Fauna Over The Last 200,000 Y In The Indian Subcontinent, Patrick Roberts, Eric Delson, Preston Miracle, Peter Ditchfield, Richard G. Roberts, Zenobia Jacobs, James Blinkhorn, Russell L. Ciochon, John G. Fleagle, Stephen R. Frost, Christopher C. Gilbert, Greg F. Gunnell, Terry Harrison, Ravi Korisettar, Michael D. Petraglia
Continuity Of Mammalian Fauna Over The Last 200,000 Y In The Indian Subcontinent, Patrick Roberts, Eric Delson, Preston Miracle, Peter Ditchfield, Richard G. Roberts, Zenobia Jacobs, James Blinkhorn, Russell L. Ciochon, John G. Fleagle, Stephen R. Frost, Christopher C. Gilbert, Greg F. Gunnell, Terry Harrison, Ravi Korisettar, Michael D. Petraglia
Faculty of Science, Medicine and Health - Papers: part A
Mammalian extinction worldwide during the Late Pleistocene has been a major focus for Quaternary biochronology and paleoecology. These extinctions have been variably attributed to the impacts of climate change and human interference. However, until relatively recently, research has been largely restricted to the Americas, Europe, and Australasia. We present the oldest Middle-Late Pleistocene stratified and numerically dated faunal succession for the Indian subcontinent from the Billasurgam cave complex. Our data demonstrate continuity of 20 of 21 identified mammalian taxa from at least 100,000 y ago to the present, and in some cases up to 200,000 y ago. Comparison of this …
Facial Approximation Of 'Angel': Case Specific Methodological Review, Susan Hayes
Facial Approximation Of 'Angel': Case Specific Methodological Review, Susan Hayes
Faculty of Science, Medicine and Health - Papers: part A
A forensic facial approximation is typically undertaken to generate further leads to identity of the deceased, and over the past ten years there has been a considerable increase in the number of verified relationships concerning the skull and likely facial appearance. This paper describes the evidence and methods used to approximate the face and facial features of a young woman whose remains were found in the Belanglo State Forest (New South Wales, Australia) in August 2010. A review of methodologically analogous forensic facial approximations (i.e. involving some degree of manual manipulation to achieve the results), and published in international academic …
Lower Pleistocene Hominid Paleobiodiversity In Southeast Asia: Evidence For A Javanese Pongine Taxon, Clement Zanolli, Anne-Marie Bacon, Luca Bondioli, Jose Braga, Fabrice Demeter, Jean Dumoncel, Claudio Tuniz, Roberto Macchiarelli
Lower Pleistocene Hominid Paleobiodiversity In Southeast Asia: Evidence For A Javanese Pongine Taxon, Clement Zanolli, Anne-Marie Bacon, Luca Bondioli, Jose Braga, Fabrice Demeter, Jean Dumoncel, Claudio Tuniz, Roberto Macchiarelli
Faculty of Science, Medicine and Health - Papers: part A
Asbtract of presentation that was presented at the 83rd Annual Meeting of the American Association of Physical Anthropologists,
Testing A Model Of Alluvial Deposition In The Middle Son Valley, Madhya Pradesh, India - Irsl Dating Of Terraced Alluvial Sediments And Implications For Archaeological Surveys And Palaeoclimatic Reconstructions, Christina M. Neudorf, Richard G. Roberts, Zenobia Jacobs
Testing A Model Of Alluvial Deposition In The Middle Son Valley, Madhya Pradesh, India - Irsl Dating Of Terraced Alluvial Sediments And Implications For Archaeological Surveys And Palaeoclimatic Reconstructions, Christina M. Neudorf, Richard G. Roberts, Zenobia Jacobs
Faculty of Science, Medicine and Health - Papers: part A
Over the past three decades, the Middle Son Valley, Madhya Pradesh, India has been the focus of archaeological, geological, and palaeoenvironmental investigations that aim to reconstruct regional climate changes in the Late Pleistocene and to understand the effects of the ∼74 ka Toba super-eruption on ecosystems and human populations in northern India. The most recently published model of alluvial deposition for the Middle Son Valley subdivides its alluvium into five stratigraphic formations, each associated with a specific artefact assemblage. In this study, new cross-valley topographic profiles, field observations and infrared stimulated luminescence (IRSL) age estimates are used to refine this …
The Evolution Of A Terrace Sequence Along The Manas River In The Northern Foreland Basin Of Tian Shan, China, As Inferred From Optical Dating, Zhijun Gong, Sheng-Hua Li, Bo Li
The Evolution Of A Terrace Sequence Along The Manas River In The Northern Foreland Basin Of Tian Shan, China, As Inferred From Optical Dating, Zhijun Gong, Sheng-Hua Li, Bo Li
Faculty of Science, Medicine and Health - Papers: part A
The Tian Shan range lies in the actively deforming part of the India-Asia collision zone. The uplift rate and deformation pattern of the Tian Shan are important for understanding the dynamics of crustal deformation in the region. The river terraces in northern Tian Shan provide key records of past changes in climate and/or regional tectonics. In this study, a terrace sequence along the Manas River in a tectonically active zone in the northern foreland basin of Tian Shan is investigated. Six river terraces were identified and dated using optically stimulated luminescence (OSL). The results show that the six terraces were …
Taphonomy Of Stegodon Florensis Remains From The Early Middle Pleistocene Archaeological Site Mata Menge, Flores, Indonesia, Gerrit Van Den Bergh, Adam Brumm, Mika Puspaningrum, Erick Setiabudi, Iwan Kurniawan, Unggul W. Prasetyo
Taphonomy Of Stegodon Florensis Remains From The Early Middle Pleistocene Archaeological Site Mata Menge, Flores, Indonesia, Gerrit Van Den Bergh, Adam Brumm, Mika Puspaningrum, Erick Setiabudi, Iwan Kurniawan, Unggul W. Prasetyo
Faculty of Science, Medicine and Health - Papers: part A
Abstract of a paper that was presented at the VIth International Conference on Mammoths and their Relatives, Greece, 5-12 May 2014.
A Single-Aliquot Luminescence Dating Procedure For K-Feldspar Based On The Dose-Dependent Met-Pirir Signal Sensitivity, Bo Li, Richard G. Roberts, Zenobia Jacobs, Sheng-Hua Li
A Single-Aliquot Luminescence Dating Procedure For K-Feldspar Based On The Dose-Dependent Met-Pirir Signal Sensitivity, Bo Li, Richard G. Roberts, Zenobia Jacobs, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
It has been shown previously that the ‘sensitivity’ of the post-infrared infrared stimulated luminescence (post-IR IRSL or pIRIR) signal—that is, the intensity of the test dose signal (Tx)—can retain a ‘memory’ of the pre-dose received in nature, but can be reset by sunlight bleaching. Based on this observation, we describe here a single-aliquot regenerative-dose (SAR) multiple elevated temperature (MET) pIRIR dating procedure for K-feldspar that differs in one important respect from the conventional SAR MET-pIRIR procedure. Instead of using a high temperature IR bleaching step between each SAR cycle—as in the conventional procedure—our modified procedure uses a solar simulator bleach …
Assessing The Time Of Final Deposition Of Youngest Toba Tuff Deposits In The Middle Son Valley, Northern India, Christina M. Neudorf, Richard G. Roberts, Zenobia Jacobs
Assessing The Time Of Final Deposition Of Youngest Toba Tuff Deposits In The Middle Son Valley, Northern India, Christina M. Neudorf, Richard G. Roberts, Zenobia Jacobs
Faculty of Science, Medicine and Health - Papers: part A
We present optical ages for quartz and K-feldspar grains extracted from sedimentary deposits above and below Youngest Toba Tuff (YTT) at two localities in the Middle Son Valley (MSV), Madhya Pradesh, India. These ash deposits have been the focus of past palaeoenvironmental investigations that aim to understand the effects of the ~ 74 ka Toba super-eruption on ecosystems and human populations in northern India. Age estimates from both quartz and feldspar grains post-date the Toba eruption and single-grain age distributions suggest that YTT ash-bearing sediments in the MSV are mainly composed of a mixture of recently sun-exposed, flood-transported grains and …
Preliminary Results Of Dietary And Environmental Reconstructions Of Early To Middle Pleistocene Stegodons From The So'a Basin Of Flores, Indonesia, Based On Enamel Stable Isotope Records, Mika Puspaningrum, Gerrit Van Den Bergh, Allan Chivas, Erick Setiabudi, Iwan Kurniawan, Adam Brumm, Thomas Sutikna
Preliminary Results Of Dietary And Environmental Reconstructions Of Early To Middle Pleistocene Stegodons From The So'a Basin Of Flores, Indonesia, Based On Enamel Stable Isotope Records, Mika Puspaningrum, Gerrit Van Den Bergh, Allan Chivas, Erick Setiabudi, Iwan Kurniawan, Adam Brumm, Thomas Sutikna
Faculty of Science, Medicine and Health - Papers: part A
Abstract of a paper that was presented at the VIth International Conference on Mammoths and their Relatives, Greece, 5-12 May 2014.
The Effect Of Band-Tail States On The Thermal Stability Of The Infrared Stimulated Luminescence From K-Feldspar, Bo Li, Sheng-Hua Li
The Effect Of Band-Tail States On The Thermal Stability Of The Infrared Stimulated Luminescence From K-Feldspar, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
The thermal stability of the infrared stimulated luminescence (IRSL) signal from a sedimentary K-feldspar was investigated using isothermal decay study. It is observed that the isothermal decay of IRSL signal cannot be described using a first-order exponential decay function. Instead, the decay can be well described by considering the presence of band-tail states. Based on the isothermal decay results, a trap depth of ∼1.92 eV was obtained for the IRSL stimulated at 50 °C and the width of the band-tail states was found to be ∼0.37 eV below the conduction band edge. Deeper trap depths (up to ∼2.06 eV) were …
Extending The Age Limit Of Luminescence Dating Using The Dose-Dependent Sensitivity Of Met-Pirir Signals From K-Feldspar, Bo Li, Zenobia Jacobs, Richard G. Roberts, Sheng-Hua Li
Extending The Age Limit Of Luminescence Dating Using The Dose-Dependent Sensitivity Of Met-Pirir Signals From K-Feldspar, Bo Li, Zenobia Jacobs, Richard G. Roberts, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
We investigated the sensitivity change of multiple-elevated-temperature (MET) stimulated post-infrared infrared-stimulated luminescence (MET-pIRIR) signals as a response to irradiation, sunlight bleaching and heating using samples from the Mu Us Desert, central China. A strong dose dependence of MET-pIRIR signal sensitivity was observed. The intensity of the test-dose signals (Tx) increase with the pre-dose received. Furthermore, the signal sensitivity can be reset by sunlight bleaching or heating. This suggests that both the electron traps and hole centres in K-feldspar can be bleached by sunlight, and can, therefore, be used for dating. Using the test-dose signal as a monitor for sensitivity change, …
On The Dose Dependency Of The Bleachable And Non-Bleachable Components Of Irsl From K-Feldspar: Improved Procedures For Luminescence Dating Of Quaternary Sediments, Bo Li, Richard G. Roberts, Zenobia Jacobs
On The Dose Dependency Of The Bleachable And Non-Bleachable Components Of Irsl From K-Feldspar: Improved Procedures For Luminescence Dating Of Quaternary Sediments, Bo Li, Richard G. Roberts, Zenobia Jacobs
Faculty of Science, Medicine and Health - Papers: part A
The infrared (IR) stimulated luminescence (IRSL) and post-IR IRSL (pIRIR) signals from K-feldspar can, for convenience, be divided into two components, bleachable and ‘non-bleachable’, where the latter corresponds to the ‘residual’ signal observed in sunlight-bleached samples. In this paper, we examine the non-bleachable component of IRSL of K-feldspar for several sedimentary samples from across Eurasia. We observed a large variability in the residual doses among these samples after prolonged exposure to sunlight. By employing multiple elevated temperature (MET) IR stimulations at 50–300 °C, we show that the residual dose increases systematically with stimulation temperature, attaining values as high as ∼50 …
Faces Of Homo Floresiensis (Lb1), Susan Hayes, Thomas Sutikna, Michael Morwood
Faces Of Homo Floresiensis (Lb1), Susan Hayes, Thomas Sutikna, Michael Morwood
Faculty of Science, Medicine and Health - Papers: part A
Since being excavated in 2003, the skull of LB1 (the holotype of Homo floresiensis) has been given many faces, though the details regarding how each was accomplished are typically few. Here we detail our application of known, and verified, relationships between the skull and soft tissues of anatomically modern humans to produce an evidence-based facial approximation of LB1. We then compare our results to nine pre-existing LB1 faces using geometric morphometrics. These analyses suggest our facial approximation differs in proportional facial width, upper lip height and nasal morphology. Some of these differences are likely due to a different interpretation of …
Beyond The Levant: First Evidence Of A Pre-Pottery Neolithic Incursion Into The Nefud Desert, Saudi Arabia, Remy Crassard, Michael D. Petraglia, Adrian G. Parker, Ash Parton, Richard G. Roberts, Zenobia Jacobs, Abdullah Alsharekh, Abdulaziz Al-Omari, Paul Breeze, Nick A. Drake, Huw S. Groucutt, Richard Jennings, Emmanuelle Regagnon, Ceri Shipton
Beyond The Levant: First Evidence Of A Pre-Pottery Neolithic Incursion Into The Nefud Desert, Saudi Arabia, Remy Crassard, Michael D. Petraglia, Adrian G. Parker, Ash Parton, Richard G. Roberts, Zenobia Jacobs, Abdullah Alsharekh, Abdulaziz Al-Omari, Paul Breeze, Nick A. Drake, Huw S. Groucutt, Richard Jennings, Emmanuelle Regagnon, Ceri Shipton
Faculty of Science, Medicine and Health - Papers: part A
Pre-Pottery Neolithic assemblages are best known from the fertile areas of the Mediterranean Levant. The archaeological site of Jebel Qattar 101 (JQ-101), at Jubbah in the southern part of the Nefud Desert of northern Saudi Arabia, contains a large collection of stone tools, adjacent to an Early Holocene palaeolake. The stone tool assemblage contains lithic types, including El-Khiam and Helwan projectile points, which are similar to those recorded in Pre-Pottery Neolithic A and Pre-Pottery Neolithic B assemblages in the Fertile Crescent. Jebel Qattar lies ~500 kilometres outside the previously identified geographic range of Pre-Pottery Neolithic cultures. Technological analysis of the …
Early And Middle Holocene Hunter-Gatherer Occupations In Western Amazonia: The Hidden Shell Middens, Umberto Lombardo, Katherine Szabo, Jose M. Capriles, Jan-Hendrik May, Wulf Amelung, Rainer Hutterer, Eva Lehndorff, Anna Plotzki, Heinz Veit
Early And Middle Holocene Hunter-Gatherer Occupations In Western Amazonia: The Hidden Shell Middens, Umberto Lombardo, Katherine Szabo, Jose M. Capriles, Jan-Hendrik May, Wulf Amelung, Rainer Hutterer, Eva Lehndorff, Anna Plotzki, Heinz Veit
Faculty of Science, Medicine and Health - Papers: part A
We report on previously unknown early archaeological sites in the Bolivian lowlands, demonstrating for the first time early and middle Holocene human presence in western Amazonia. Multidisciplinary research in forest islands situated in seasonally-inundated savannahs has revealed stratified shell middens produced by human foragers as early as 10,000 years ago, making them the oldest archaeological sites in the region. The absence of stone resources and partial burial by recent alluvial sediments has meant that these kinds of deposits have, until now, remained unidentified. We conducted core sampling, archaeological excavations and an interdisciplinary study of the stratigraphy and recovered materials from …
Micro-Biomechanics Of The Kebara 2 Hyoid And Its Implications For Speech In Neanderthals, Ruggero D'Anastasio, Stephen Wroe, Claudio Tuniz, Lucia Mancini, Deneb T. Cesana, Diego Dreossi, Mayoorendra Ravichandiran, Marie Attard, William C. H Parr, Anne Agur, Luigi Capasso
Micro-Biomechanics Of The Kebara 2 Hyoid And Its Implications For Speech In Neanderthals, Ruggero D'Anastasio, Stephen Wroe, Claudio Tuniz, Lucia Mancini, Deneb T. Cesana, Diego Dreossi, Mayoorendra Ravichandiran, Marie Attard, William C. H Parr, Anne Agur, Luigi Capasso
Faculty of Science, Medicine and Health - Papers: part A
The description of a Neanderthal hyoid from Kebara Cave (Israel) in 1989 fuelled scientific debate on the evolution of speech and complex language. Gross anatomy of the Kebara 2 hyoid differs little from that of modern humans. However, whether Homo neanderthalensis could use speech or complex language remains controversial. Similarity in overall shape does not necessarily demonstrate that the Kebara 2 hyoid was used in the same way as that of Homo sapiens. The mechanical performance of whole bones is partly controlled by internal trabecular geometries, regulated by bone-remodelling in response to the forces applied. Here we show that the …
Neandertal Toolmakers Left A Leatherworking Legacy, Zenobia Jacobs, Marie Soressi, Shannon P. Mcpherron
Neandertal Toolmakers Left A Leatherworking Legacy, Zenobia Jacobs, Marie Soressi, Shannon P. Mcpherron
Faculty of Science, Medicine and Health - Papers: part A
Ever since the Neandertal (Homo neanderthalensis) type fossil was discovered in the Neander Valley of Germany in 1856, the species has been variously portrayed as knuckle-dragging cavemen and primitive members of the human family tree who became extinct as a result of being more stupid than members of our own species, Homo sapiens.
Determining The Cooling Age Using Luminescence-Thermochronology, Bo Li, Sheng-Hua Li
Determining The Cooling Age Using Luminescence-Thermochronology, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
Luminescence technique has been shown to have great potential in low-temperature (< 100 °C) themochronology. This study investigates the kinetic process of luminescence in a cooling system. We present a new formula that can be used for determining the cooling age based on luminescence-thermochronology. The cooling rate can be obtained directly from a plot of luminescence age versus the present temperature. We show that the application and capacity of luminescence-thermochronology are significantly controlled by the saturation of luminescence and environmental dose rate.
The Tangarutu Invertebrate Fauna, Katherine Szabo, Atholl Anderson
The Tangarutu Invertebrate Fauna, Katherine Szabo, Atholl Anderson
Faculty of Science, Medicine and Health - Papers: part A
The island of Rapa presents an interesting lens through which to investigate human decisionmaking and resource-use patterns in a marginal environment. In addition to being small and isolated, Rapa is climatically marginal, being positioned on the southern fringe of the tropical Indo-West Pacific marine province. Most obviously, this geographical situation translates to restricted species diversity, with a great many common tropical taxa not able to survive the conditions. However, as pointed out by Preece (1995:345), it would be a mistake to see the marine fauna of marginal Polynesian islands as simply an impoverished subset of the tropical Indo-West Pacific community. …
Study Of The Relationship Between Infrared Stimulated Luminescence And Blue Light Stimulated Luminescence For Potassium-Feldspar From Sediments, Zhijun Gong, Bo Li, Sheng-Hua Li
Study Of The Relationship Between Infrared Stimulated Luminescence And Blue Light Stimulated Luminescence For Potassium-Feldspar From Sediments, Zhijun Gong, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
In luminescence measurements of potassium-feldspar (K-feldspar), both infrared (IR) and blue light (BL) can be used as stimulation sources. Component analysis suggests that the blue light stimulated luminescence (BLSL) measured at 60 °C from K-feldspar can be fitted using three components, namely fast, medium and slow. In order to explore the relationship between the origin of the infrared stimulated luminescence (IRSL) signal and the different components of the BLSL, five sets of experiments were conducted, namely post-IR BLSL (pIR-BLSL), post-BL IRSL (pBL-IRSL), pulse annealing tests, dose response and laboratory fading rate tests. It is observed that most of the IRSL …
Holocene Environmental Changes In Central Inner Mongolia Revealed By Luminescence Dating Of Sediments From The Sala Us River Valley, Sheng-Hua Li, Jimin Sun, Bo Li
Holocene Environmental Changes In Central Inner Mongolia Revealed By Luminescence Dating Of Sediments From The Sala Us River Valley, Sheng-Hua Li, Jimin Sun, Bo Li
Faculty of Science, Medicine and Health - Papers: part A
Luminescence dating of the fluvial and lacustrine sediments from the Sala Us River valley at the south edge of the Mu Us Desert, central Inner Mongolia, is reported. The study region lies in the northwestern marginal zone of the east Asian summer monsoon and is sensitive to climate change. The dating results combined with environmental proxies indicate that the Holocene Climate Optimum period, took place from 8.5 to 5 ka ago and was marked by lake development. After ~5 ka ago, the region became arid, as inferred from lake regression and fluvial activity. Deposition of fluvial sediments lasted from ~5 …
Experimental And Computational Simulation Of Beta-Dose Heterogeneity In Sediment, Alastair C. Cunningham, Daniel J. De Vries, Dennis R. Schaart
Experimental And Computational Simulation Of Beta-Dose Heterogeneity In Sediment, Alastair C. Cunningham, Daniel J. De Vries, Dennis R. Schaart
Faculty of Science, Medicine and Health - Papers: part A
Interpreting the spread in equivalent-dose estimates is an important aspect of optically stimulated luminescence (OSL) dating. Ideally, prior to age estimation, an assessment should be made of the likely spread in equivalent dose due to dose-rate heterogeneity in the sediment. Such a procedure would greatly increase the validity of OSL ages, particularly for sediments susceptible to partial bleaching, and for sediments with coarse or poorly sorted grain-size distributions. In this paper we take a step towards a general model of dose-rate heterogeneity by simulating the 40K-derived beta dose to quartz. We present an experimental simulation of the 40K beta dose, …
Fossils Of Stegodon And Varanus Komodoensis Sumba And Flores: A Pleistocene Landbridge, Erick Setiyabudi, Iwan Kurniawan, Gerrit Van Den Bergh
Fossils Of Stegodon And Varanus Komodoensis Sumba And Flores: A Pleistocene Landbridge, Erick Setiyabudi, Iwan Kurniawan, Gerrit Van Den Bergh
Faculty of Science, Medicine and Health - Papers: part A
Abstract of a paper that presented at the 2012 Ikatan Ahli Geologi Indonesia Annual Meeting.
Approximating The Face Of 'Aunty': A Question Of Likeness, Susan Hayes, Hallie Buckley, Richard Bradley, Nick Milne, John Dennison
Approximating The Face Of 'Aunty': A Question Of Likeness, Susan Hayes, Hallie Buckley, Richard Bradley, Nick Milne, John Dennison
Faculty of Science, Medicine and Health - Papers: part A
This paper describes two approaches to the facial approximation of three individuals from the Wairau Bar burial site (New Zealand). Two individuals were approximated working in direct reference to the remains and incorporated manual drafting. The third individual, 'Aunty' (the respectful title given by the iwi Rangitane elders) was approximated from CT scans and using computer graphics. The computer graphic approach enabled a greater level of precision in the application of the research and recommendations that inform a facial approximation, and facilitated collaboration with appropriate expertise. The computer-graphic approach, however, also resulted in a more photographic facial appearance, which can …
Archaeological Science In Australia: Integrating Across Disciplines And Scales Of Analysis, Zenobia Jacobs
Archaeological Science In Australia: Integrating Across Disciplines And Scales Of Analysis, Zenobia Jacobs
Faculty of Science, Medicine and Health - Papers: part A
The basic questions in prehistoric archaeology have not changed much over the last forty years. In Australia, we continue to debate when and where Australia and its arid interior were first colonised, and whether or not these early colonisers were responsible for the extinction of the Australian megafauna. These questions are broad and any answers involve interdisciplinary teamwork that crosses conventional academic boundaries - the humanities and sciences.
Realizing The Potential Of Fluvial Archives Using Robust Osl Chronologies, Alastair C. Cunningham, Jakob Wallinga
Realizing The Potential Of Fluvial Archives Using Robust Osl Chronologies, Alastair C. Cunningham, Jakob Wallinga
Faculty of Science, Medicine and Health - Papers: part A
Optically Stimulated Luminescence (OSL) dating has enormous potential for interpreting fluvial sediments, because the mineral grains used for OSL dating are abundant in fluvial deposits. However, the limited light exposure of mineral grains during fluvial transport and deposition often leads to scatter and inaccuracy in OSL dating results. Here we present a statistical protocol which aims to overcome these difficulties. Rather than estimating a single burial age for a sample, we present ages as likelihood functions created by bootstrap re-sampling of the equivalent-dose data. The bootstrap likelihoods incorporate uncertainty from age-model parameters and plausible variation in the input data. This …
Pleistocene Survivors And Holocene Extinctions: The Giant Rats From Liang Bua (Flores, Indonesia), Elisa Locatelli, Rokhus Awe Due, Gerrit D. Van Den Bergh, Lars W. Van Den Hoek Ostende
Pleistocene Survivors And Holocene Extinctions: The Giant Rats From Liang Bua (Flores, Indonesia), Elisa Locatelli, Rokhus Awe Due, Gerrit D. Van Den Bergh, Lars W. Van Den Hoek Ostende
Faculty of Science, Medicine and Health - Papers: part A
Excavations at Liang Bua Cave yielded a large amount of micromammal remains, the major part of which are murids, and some can be referred to three different species of giant rats. Whilst Papagomys armandvillei is still living on Flores, the other two species, Papagomys theodorverhoeveni and Spelaeomys florensis went extinct late during the Holocene. In this paper, the fossil record of these species at Liang Bua Cave is discussed. These giant murids are a clear example of insular gigantism, and can be seen as end members of the Island Rule. Opposition against the general applicability of this 'rule' is mainly …
Luminescence Dating Of K-Feldspar From Sediments: A Protocol Without Anomalous Fading Correction, Bo Li, Sheng-Hua Li
Luminescence Dating Of K-Feldspar From Sediments: A Protocol Without Anomalous Fading Correction, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
A protocol for optical dating of potassium-rich feldspar (K-feldspar) is proposed. It utilizes the infrared stimulated luminescence (IRSL) signal measured by progressively increasing the stimulation temperature from 50 to 250 °C in step of 50 °C, so-called multi-elevated-temperature post-IR IRSL (MET-pIRIR) measurements. Negligible anomalous fading was observed for the MET-pIRIR signals obtained at 200 and 250 °C. This was supported by equivalent dose (De) measurements using the IRSL and MET-pIRIR signals. The De values increase progressively from 50 °C to 200 °C, but similar De values were obtained for the MET-pIRIR signal at 200 and 250 °C. Measurement of modern …
Thermal Stability Of Infrared Stimulated Luminescence Of Sedimentary K-Feldspar, Bo Li, Sheng-Hua Li
Thermal Stability Of Infrared Stimulated Luminescence Of Sedimentary K-Feldspar, Bo Li, Sheng-Hua Li
Faculty of Science, Medicine and Health - Papers: part A
The thermal stability of the infrared stimulated luminescence (IRSL) signal measured at 50 °C as a function of IR stimulation time was investigated using KF grains extracted from sediments from central China. A dependence of thermal stability of IRSL signal on IR stimulation time and stimulation temperature were observed in pulse annealing studies. Relatively lower thermal stability is given by the initial part of the IRSL measured at 50 °C, than the later part of IRSL curve. Based on these observations, the thermal stability of the post-IR IRSL signal stimulated at elevated temperatures (100–200 °C) was also investigated. It was …
Reply To Comment By Huntley On "Isochron Dating Of Sediments Using Luminescence Of K-Feldspar Grains", Bo Li, Sheng-Hua Li, Hui Zhao
Reply To Comment By Huntley On "Isochron Dating Of Sediments Using Luminescence Of K-Feldspar Grains", Bo Li, Sheng-Hua Li, Hui Zhao
Faculty of Science, Medicine and Health - Papers: part A
In our isochron studies using grains of different sizes, we observed that the IRSL ages obtained from K‐feldspar without correction for fading show an increase with increasing grain size [Li et al., 2007, 2008]. Huntley [2011a] argued that this result was caused by different fading rates for grains of different sizes or by different source materials for different sizes of grains. We replied to his comment [Li et al., 2011], suggesting that the phenomenon could be explained by there being different fading rates for the IRSL signals produced by natural and laboratory irradiation [Li et al., 2007, 2008]. Instead of …