Andrew Sean Murray

Andrew Sean Murray
Aarhus University | AU · Nordic Laboratory for Luminescence Dating, Department of Geoscience

BSc, DPhil

About

604
Publications
101,415
Reads
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42,644
Citations
Citations since 2016
140 Research Items
17808 Citations
201620172018201920202021202205001,0001,5002,0002,5003,000
201620172018201920202021202205001,0001,5002,0002,5003,000
201620172018201920202021202205001,0001,5002,0002,5003,000
201620172018201920202021202205001,0001,5002,0002,5003,000
Additional affiliations
August 1996 - present
Aarhus University
Position
  • Luminescence dating
September 1986 - August 1996
The Commonwealth Scientific and Industrial Research Organisation
Position
  • Principal Rerserach Scientist
September 1974 - December 1979
University of Oxford
Position
  • DPhil student

Publications

Publications (604)
Conference Paper
Full-text available
The Middle and Upper Pleistocene in the General Sequence of the Guadalquivir River Terraces (GSGT): new luminescence ages from the T12 and T13 terraces (La Rinconada, SW Spain): This work includes the luminescence dating (quartz-OSL, pIRIR on K-feldespar and TL) of the T12 and T13 terraces of the Guadalquivir River near La Rinconada (Seville). Lith...
Article
Although the Upper Volga has been the focus of extensive research for several decades, its origin and evolution remain uncertain. According to the most popular model, the Upper Volga drainage network formed at the end of the last deglaciation (MIS 2); before that, the river basin was occupied by a large MIS2 proglacial lake. In this study we test t...
Article
The Late Quaternary history of the Caspian Sea remains controversial. One of the major disagreements in this debate concerns the stratigraphic correlation of various deposits in the Caspian Basin. In this paper we identify and date, for the first time, the Enotaevka regression, lying between the two major phases of the largest Late Quaternary Caspi...
Article
The south of Western Siberia is an important part of the Eurasian loess belt, containing an extensive record of Quaternary landscape and climate evolution in up to 100 m thick loess deposits with as many as 10 pedocomplexes. However, this important Quaternary archive lacks a reliable absolute chronology, and this has prevented the linking of the wi...
Article
Loess-palaeosol deposits of the Upper Pleistocene cover an extensive territory in the south of Western Siberia. Previously, most studies of loess-palaeosol sequences were carried out on river bank sections of the Ob river around Novosibirsk and upstream of this location (Ob Loess plateau); more recently, the focus of research has shifted towards th...
Article
Full-text available
Some of the largest catastrophic outbursts of periglacial lakes known in the geological history of the Earth have been identified in the Altai Mountains. Traces of these events are recorded in the form of large terraces, predominantly composed of gravel material with numerous horizons of large boulders and blocks. Determining the age of these large...
Article
We present a detailed luminescence chronology of the loess-palaeosol sequences in the Lower Volga region of Russia at the Leninsk site – an important palaeogeographic archive describing the climate and environmental conditions of regressive stages of the Caspian Sea. The chronology of these sediments has received very little attention compared to t...
Article
Dating agricultural artefacts such as field walls and clearance cairns using radiocarbon can be challenging, especially since the association with datable material may be poor. Rock surface burial dating using luminescence offers an alternative. Here we report on the luminescence dating of a medieval circular stone-walled enclosure at Sønnebøe, nor...
Article
Full-text available
—Lacustrine sediments, related subaerial aeolian sands, as well as fluvioglacial sands enclosed in ablation moraines in the Chuya River valley between the Chuya and Kurai basins in Gorny Altai, have been dated by optically stimulated (OSL) and infrared stimulated (IRSL) luminescence. The OSL and IRSL ages indicate that the formation of the lake, wh...
Article
The normally-closed Caspian Sea is known for large changes in relative sea-level (of ∼170 m) during the late Quaternary. These transgressive/regressive events influenced the topography, sedimentation and ecosystems of a large area, of up to 1 million km². The Volga River has played an important role in the water balance of the Caspian Quaternary ba...
Article
There is considerable evidence of widespread damage in the 7th millennium habitation sites across Jordan. The origins of this damage are unknown, but the most widely accepted hypothesis associates the resulting rubble and gravel deposits with the Holocene Rapid Climate Change. One way of testing the various hypotheses is to provide a more reliable...
Article
Full-text available
An understanding of the early development of surface water control systems in Petra, Jordan, has thus far eluded investigators. While the Nabateans certainly used these extensively, it is not clear if they were the first to do so. In some areas in the headwaters of Petra in the Sharah Mountains, megalithic structures have been reported, with some i...
Article
Optically stimulated luminescence (OSL) signals from quartz can be used to determine when sedimentary archives were deposited. OSL dating uses the accumulation of energy stored in a crystal structure to measure time. This stored energy is absorbed from ionizing radiation, and is released (reset) by heat or daylight. The total specific energy (dose)...
Article
This study, focused on the well-exposed terrace deposits of the Guadalaviar and Turia rivers and associated slopes, provides a better understanding of the genetic connection between river-terrace sediments and slope accumulations in a setting influenced by temperate to cold (extraglacial) climates: the Sierra de Albarracín and Alfambra–Teruel depre...
Presentation
Access the published article (open access) --> https://doi.org/10.1016/j.geomorph.2022.108396 We define a conceptual model of punctuated incision for strath terrace formation, with implications for deriving river incision and rock uplift rates. To illustrate this model, we present a detailed ~200 kyr history of strath terrace formation spanning tw...
Article
We have analyzed the modern status of the chronostratigraphic differentiation of the loess–paleosoil series in southwestern Siberia and the results of luminescence dating of the reference section of the Altai low mountains near the settlement of Krasnogorskoe. A complete series of the Middle and the Late Pleistocene levels of paleosoil formation is...
Article
The Late Pleistocene and Holocene in western Asia is characterized by frequent, millennial-scale, high-amplitude environmental climatic changes. However, little is known about palaeoclimate conditions on the arid Central Iranian Plateau and knowledge of palaeosols and past phases of pedogenesis in relation to climatic events is scarce. Nevertheles...
Article
Full-text available
Permafrost region subsurface organic carbon (OC) pools are a major component of the terrestrial carbon cycle and vulnerable to a warming climate. Thermokarst lagoons are an important transition stage with complex depositional histories during which permafrost and lacustrine carbon pools are transformed along eroding Arctic coasts. The effects of te...
Article
In this study we present a luminescence investigation of samples from the Požarevac loess–palaeosol sequence (LPS) in north–eastern Serbia. The pIRIR290 signal displayed a generally good behaviour and yielded stratigraphically consistent De values. The pIRIR290 ages show very good agreement (within uncertainty) with the expected stratigraphic ages...
Article
Full-text available
Olieboomspoort is one of the few rock shelters in the vast interior of southern Africa documenting pulses of occupation from the Acheulean until the end of the Later Stone Age. Revil Mason excavated the site in 1954 and attributed the large Middle Stone Age (MSA) lithic assemblage to his middle phase of the so-called Pietersburg Industry. Recent wo...
Article
Full-text available
In high-resolution γ spectrometry ²³⁸U decay chain members can be measured by comparing reference material and unknown sample count rates induced by the γ lines assigned to ²¹⁴Pb and ²¹⁴Bi. Both ²¹⁴Pb and ²¹⁴Bi are daughter radionuclides of ²²²Rn. This noble gas nuclide can escape from both natural samples, and reference materials. If this escape i...
Article
The interpretation of the use and contextual meaning of fossil agrarian forms is connected with their age. In this article we discuss the dating and interpretation of a field wall in Öggestorp, situated on the northern rim of the southern Swedish uplands in the province of Småland. Öggestorp is a complex archaeological site dating from the early Ir...
Preprint
Full-text available
Mineral grains within sediment or rock absorb a radiation dose from the decay of radionuclides in the host matrix. For the beta dose component, the estimated dose rate must be adjusted for the attenuation of beta particles within the mineral grains. Standard calculations, originally designed for thermoluminescence dating of pottery, assume that the...
Article
Autzen et al (2018) observed a decrease in quartz luminescence at very high doses (several MGy) and hypothesised that this decrease was linked to a reduction in the trapped hole population as a result of their silt-sized grains (̴50 μm diameter) retaining excess electrons during irradiation. In this paper, we expand on simulations of [1] to cover b...
Article
Loess deposits are widely spread all over Eastern Europe, extending as far south as the Sea of Azov and the northern Black Sea. For many decades these regions have been noted for series of key sections. However, despite prolonged investigations, a lack of absolute dating and detailed lithological data has left many unresolved problems in the correl...
Article
Full-text available
A detailed study is presented of a 15.3‐m‐thick Pleistocene coastal terrace located on the Cantabrian coast (northern Spain). Stratigraphic, sedimentological, topographic and micropalaeontological information is combined with a chronology based on luminescence dating to characterize the deposits. The sedimentary succession records: (i) a basal tran...
Article
Previous experiments and modelling suggest that quartz and feldspar grains receive a net negative charge when irradiated with electrons. Here we used silt-sized grains of quartz and feldspar to investigate the behaviour of luminescence at very high electron doses, when electrostatic effects become possible. Both quartz and feldspar show an increasi...
Article
Full-text available
Statistical analysis has become increasingly important in optically stimulated luminescence (OSL) dating since it has become possible to measure signals at the single-grain scale. The accuracy of large chronological datasets can benefit from the inclusion, in chronological modelling, of stratigraphic constraints and shared systematic errors. Recent...
Article
Dryland slopes, fluvial fans and terraces are recognized as highly sensitive process-response systems and important geoarchives for the reconstruction of palaeoclimatic driven landscape development in Southern Africa. The aim of this study is to study a dryland drainage system with a clearly limited regional catchment area, whose drainage and sedim...
Article
The rate of charge deposition in quartz grains irradiated in natural conditions is computed by radiation transport modeling. Quartz luminescence models are modified with the addition of the resulting charge deposition term, and the influence of this process on the optically stimulated luminescence (OSL) signal is analyzed. The results indicate tha...
Article
Full-text available
We constrain the age of a cobble beach ridge system in Greenland using Optically Stimulated Luminescence (OSL) dating of buried cobble surfaces. Luminescence signals from six cobbles are measured using infrared (IR) stimulation at 50 °C (IR50) and 180 °C (pIRIR180); these cobbles represent four progressively younger beach ridges lying between ~35 a...
Article
Full-text available
In this study, we explored the potential of a NaI(Tl) scintillator-based gamma spectrometer for the accurate determination of burial dose rates in natural geological samples using a full spectrum analysis (FSA) approach. In this method, an iterative reweighted least-square regression is used to fit calibration standard spectra ( ⁴⁰ K, and ²³⁸ U and...
Presentation
Full-text available
How do river terraces form on geological & archaeological timescales? In this AGU 2020 presentation I will challenge the current dominant model of terrace formation. I will then demonstrate my own with a field site in Morocco. Watch the presentation: youtu.be/RjoKETiFa4Y###############################################################################...
Preprint
Full-text available
Statistical analysis has become increasingly important in the field of OSL dating since it has become possible to measure signals at the single grain scale. The accuracy of large chronological datasets can benefit from the inclusion, in chronological modelling, of stratigraphic constraints and shared systematic errors. Recently, a number of Bayesia...
Article
Full-text available
Due to the high preservation of the loess series and the availability of coastal outcrop sections loess cover of Western Ciscaucasia has ample opportunities for spatial paleogeographical reconstructions for the Middle and Late Pleistocene. Currently, the level of knowledge on the structure and composition of the loess-paleosol sequences of Western...
Article
Full-text available
During the late Quaternary, dramatic changes in relative sea level (~170 m) are known to have occurred in the Caspian Sea. However, all previous attempts at resolving the uncertainty associated with the timing of these transgressive/ regressive events, primarily using radiocarbon, have produced inconclusive or controversial results. Here we present...
Article
The draining of the herein introduced ancient Lake Elji, and the subsequent erosion of its lacustrine sediments, were necessary precursors to the Late Epipalaeolithic (Natufian) and later settlement of Petra. This study investigates this geological history and relates it to human occupation of the broader region. Widespread carbonates consisting of...
Article
Full-text available
A post-IR IRSL chronology and dust mass accumulation rates of the Nosak loess-palaeosol sequence in northeastern Serbia. Boreas, https://doi.org/10.1111/bor.12459. ISSN 0300-9483. In the Middle Danube Basin, Quaternary deposits are widely distributed in the Vojvodina region where they cover about 95% of the area. Major research during the last two...
Article
Full-text available
The timing of the Neanderthal-associated Middle Palaeolithic demise and a possible overlap with anatomically modern humans (AMH) in some regions of Eurasia continues to be debated. The Iberian Peninsula is considered a possible refuge zone for the last Neanderthals, but the chronology of the later Middle Palaeolithic record has undergone revision a...
Conference Paper
To download the presentation visit the DOI link above --> ############################################################## River strath terraces reflect changes in lateral and vertical erosion rates within mountain valleys related to changes in the sediment to water discharge ratio. In contrast to the formation of terraces in high latitude glaciated...
Article
Full-text available
During successive Pleistocene ice ages, Finnish Lapland lay under the cold-based centre of the Fennoscandian Ice Sheet (FIS). This area largely escaped deep glacial erosion by the fast-flowing wet-based ice streams that developed toward the periphery of successive ice sheets. Low erosion is evident from the preservation of Neogene weathered bedrock...
Article
The Kosika locality is situated on the lowest terrace of the Enotayevka River (right channel of the Volga River) near Kosika village, in the Astrakhan region of the Russian Federation. This locality includes several sections, named Kosika 1–4 and Borehole 2 Kosika that are described in detail for the first time. Drilling, sediment descriptions, and...
Poster
Full-text available
The effects of climate on eroding landscapes and the delivery of sediment from these remain poorly understood. The sampling and dating of river terraces provide one way to address this question, because these embed information about the interconnected dynamics of mountain valley widening, river incision, sediment delivery, and their sensitivity to...
Conference Paper
Full-text available
Introduction: Absent chronologies On the territory of Serbia, Quaternary deposits are mainly distributed in the Vo-jvodina region where they cover about 95% of the area. Major research interest during the last two decades has been focused on these loess deposits. During this short period loess in Vojvodina became one of the most important Pleistoce...
Poster
Full-text available
Geomorphological evidence in the Altai Mountains, in southern Siberia, indicates that catastrophic drainage of glacier-dammed lakes occurred at some point in the past. The evidence includes giant ripples in the valleys of large rivers, spillways, and large boulders transported considerable distances. These fluvial landforms can only have formed wit...
Poster
The area of Essaouira is located in the Atlantic Atlas structural domain of Morocco. Most of this coastal area comprises an aeolian dune field constituted by presumably Pleistocene and Holocene aeolian deposits, mainly sourced from the adjacent beach and showing longitudinal dunes and barchans. Quaternary marine terraces also occur. In this study w...
Article
Full-text available
In this study, we investigate quartz-based luminescence optical dating of Iron Age deposits at the archaeological site of Tell Damiyah in the Jordan valley. Ten samples, taken from different occupation layers from two different excavation areas, proved to have good luminescence characteristics (fast-component dominated, dose recovery ratio 1.032 ±...
Article
Full-text available
In this study, we test the applicability of luminescence dating to geo-archaeological sediments from a “tell” (mound) formation. Combined quartz optically stimulated luminescence (OSL) and K-feldspar infrared-stimulated luminescence (IRSL) dating were applied to eight sediment samples taken from the Tell al-Magass archaeological site in southern Jo...
Conference Paper
Full-text available
The Thames and Tejo terrace stratigraphies have long histories of research, with an enviable profusion of Palaeolithic artefact content in both valleys and copious fossils in interglacial Thames sediments in the valley downstream of London. Thus biostratigraphy is a well-established basis for classification of the lithostratigraphical sequence in t...
Conference Paper
Full-text available
New OSL dating from the Southern slope of the Pyrenees are present in this work. Such a datations update the most relevant glacial phases identified by previous authors. From our data two glacial cycles are clearly dated, the penultimate and the last glacial cycle. The last glacial cycle can be divided in four major phases: 1. An early glacier ext...
Conference Paper
Full-text available
This study presents new geochronological and paleoclimatic data from the lower terraces of the Tagus River in the environs of Toledo city (central Spain). Within the Upper Tagus basin, a maximum of 22 terrace levels developed from +180 m to +3-5 m (above present river thalwegs). The research is focused on Middle to Late Pleistocene terraces with pa...
Conference Paper
Full-text available
In western Iberia, mechanisms that explain the transition from endorheic to exorheic continental-scale drainage reorganisation are foreland basin overspill, headwards erosion and capture by an Atlantic river, or a combination of both. To explore these controls we have investigated the Portuguese sector of the Douro River, the site of drainage re-or...
Conference Paper
Full-text available
The Middle and Upper Pleistocene in the General Sequence of the Guadalquivir River Terraces (GSGT): new luminescence ages from the T12 and T13 terraces (La Rinconada, SW Spain): This work includes the luminescence dating (quartz-OSL, pIRIR on K-feldespar and TL) of the T12 and T13 terraces of the Guadalquivir River near La Rinconada (Seville). Lith...
Article
In western Iberia, mechanisms that can explain the transition from endorheic to exorheic continental-scale drainage reorganization are foreland basin overspill, headwards erosion and capture by an Atlantic river, or a combination of both. To explore these, we have investigated the Portuguese sector of the Douro River, the locus of drainage reorgani...
Article
Full-text available
This Data in Brief paper contains data (including images) from Quaternary sedimentary successions investigated along the Bol’shaya Balakhnya River and the Luktakh–Upper Taimyra–Logata river system on southern Taimyr Peninsula, NW Siberia (Russia). Marine foraminifera and mollusc fauna composition, extracted from sediment samples, is presented. The...
Article
Full-text available
Here we investigate, for the first time, the use of optically stimulated luminescence (OSL) for dating cobbles from the body of successive beach ridges and compare cobble surface‐derived ages to standard quartz OSL ages from sand. Between four and eight cobbles and sand samples (age control) were dated with the luminescence method, taken from the m...