Staff Profiles

Modules taught

U21175 Arid Zones

U21147 Geoarchaeology

U21126 Geograpgical Enquiry and Field Research

U21180 Geographical Research and Practice

Further information

Palaeodeserts Project

Rustaq Batinah Archaeological Project

Oasiwat

Journal articles

• Scerri EML, Shipton C, Clark-Balzan L, Frouin M, Schwenninger J-L, Groucutt HS, Breeze PS, Parton A, Blinkhorn J, Drake NA, Jennings R, Cuthbertson P, Al Omari A, Alsharekh AM, Petraglia MD, 'The expansion of later Acheulean hominins into the Arabian Peninsula'
  Nature Scientific Reports 8 (2018)
  ISSN: 2045-2322
  Abstract

  The Acheulean is the longest lasting cultural–technological tradition in human evolutionary history. However, considerable gaps remain in understanding the chronology and geographical distribution of Acheulean hominins. We present the first chronometrically dated Acheulean site from the Arabian Peninsula, a vast and poorly known region that forms more than half of Southwest Asia. Results show that Acheulean hominin occupation expanded along hydrological networks into the heart of Arabia from Marine Isotope Stage (MIS) 7 until at least ~190 ka ̶ the youngest documented Acheulean in Southwest Asia. The site of Saffaqah features Acheulean technology, characterized by large flakes, handaxes and cleavers, similar to Acheulean assemblages in Africa. These findings reveal a climatically-mediated later Acheulean expansion into a poorly known region, amplifying the documented diversity of Middle Pleistocene hominin behaviour across the Old World and elaborating the terminal archaic landscape encountered by our species as they dispersed out of Africa.
  

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• Parton A, Clark-Balzen L, Parker A, Preston G, Sung WW, Breeze PS, Leng M, Groucutt H, White T, Alsharekh A, Petraglia M, 'Middle-Late Quaternary Palaeoclimate Variability from Lake and Wetland Deposits in the Nefud Desert, Northern Arabia'
  Quaternary Science Reviews 202 (2018) pp.78-97
  ISSN: 0277-3791 eISSN: 1873-457X
  Abstract

  Records of former lake and wetland development in present day arid/hyper-arid environments provide an important source of information for palaeoclimatic and palaeoenvironmental studies. In Arabia, such records are typically confined to eccentricity-modulated insolation maxima, and are often spatially and temporally discontinuous. Here we present records from a single locality in Northern Arabia of wetter interludes during both global interglacial and glacial conditions, providing a unique opportunity to examine the nature of these events in a common setting. At Jubbah, in the southern Nefud Desert, lake and wetland deposits reveal the repeated formation of a water body within a large endorheic basin over the past ca. 360 kyr. Lake/wetland formation occurred during MIS 11/9, 7, 5, 3 and the early Holocene, assisted by local topographic controls, and spring recharge. Palaeoenvironmental and palaeoecological data reveal the existence of a large still water body formed during either MIS 11 or 9 (ca. 363 ka), and basin wide alluviation followed by lake formation during MIS 7 (ca. 212 ka). During MIS 5e (ca. 130 ka) a large freshwater lake occupied the basin, while during MIS 5a (ca. 80 ka) the basin contained a shallow wetland and freshwater lake complex. Lake/wetland formation also occurred during early MIS 3 (ca. 60 ka), at the Terminal Pleistocene-Holocene transition (ca. 12.5 ka), and the early-middle Holocene (ca. 9-6.5 ka). Phases of lake and wetland development coincided with human occupation of the basin during the Middle Palaeolithic, Epipalaeolithic and Neolithic periods, highlighting the significance of the region for early demographic change.

  Website 
• Shipton S, Blinkhorn J, Breeze PS, Cuthbertson P, Drake N, Groucutt HS, Jennings RP, Parton A, Scerri EML, Alsharekh A, Petraglia MD, 'Acheulean technology and landscape use at Dawadmi, central Arabia'
  PLoS ONE 13 (7) (2018)
  ISSN: 1932-6203
  Abstract

  Despite occupying a central geographic position, investigations of hominin populations in the Arabian Peninsula during the Lower Palaeolithic period are rare. The colonization of Eurasia below 55 degrees latitude indicates the success of the genus Homo in the Early and Middle Pleistocene, but the extent to which these hominins were capable of innovative and novel behavioural adaptations to engage with mid-latitude environments is unclear. Here we describe new field investigations at the Saffaqah locality (206–76) near Dawadmi, in central Arabia that aim to establish how hominins adapted to this region. The site is located in the interior of Arabia over 500 km from both the Red Sea and the Gulf, and at the headwaters of two major extinct river systems that were likely used by Acheulean hominins to cross the Peninsula. Saffaqah is one of the largest Acheulean sites in Arabia with nearly a million artefacts estimated to occur on the surface, and it is also the first to yield stratified deposits containing abundant artefacts. It is situated in the unusual setting of a dense and well-preserved landscape of Acheulean localities, with sites and isolated artefacts occurring regularly for tens of kilometres in every direction. We describe both previous and recent excavations at Saffaqah and its large lithic assemblage. We analyse thousands of artefacts from excavated and surface contexts, including giant andesite cores and flakes, smaller cores and retouched artefacts, as well as handaxes and cleavers. Technological assessment of stratified lithics and those from systematic survey, enable the reconstruction of stone tool life histories. The Acheulean hominins at Dawadmi were strong and skilful, with their adaptation evidently successful for some time. However, these biface-makers were also technologically conservative, and used least-effort strategies of resource procurement and tool transport. Ultimately, central Arabia was depopulated, likely in the face of environmental deterioration in the form of increasing aridity.
  

  Website 
• Clark-Balzan L, Parton A, Breeze PS, Groucutt HS, Petraglia MD, 'Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah basin, Saudi Arabia'
  Quaternary Geochronology 45 (April 2018) (2017) pp.50-73
  ISSN: 1871-1014
  Abstract Most of the world's presently hyper-arid desert regions have experienced previous periods of significantly higher humidity and milder environmental conditions. The timing of these 'greening events' is critical to research upon global climatic fluctuations and for studies of hominin palaeodemography and range expansion, contraction, and extinction, but dating these climatic shifts via terrestrial sedimentary records can be difficult. Here, we outline the challenges inherent in the radiometric dating of carbonate- and evaporite-rich sediments preserved in the Jubbah basin (Nefud Desert, northern Saudi Arabia), a critical area for reconstructing the evolution of local hydrological regimes across long timescales. The Jubbah basin is surrounded by sandstone jebels (bedrock outcrops), which have prevented significant leeward dune accumulation for at least 400,000 years. The sedimentary sequences in the basin indicate repeated fluctuations between arid and humid climatic conditions, and provide key hydroclimatic records for northern Arabia. Quartz OSL and feldspar pIRIR290 luminescence measurements and radiocarbon dating efforts are reported from four palaeoenvironmental sections in the Jubbah basin. Dates from sand-rich levels are relatively unproblematic, but significant difficulties were encountered when calculating luminescence ages from carbonate and evaporite-rich sediments. Examination of the age-depth profiles, elemental composition, and sedimentological characteristics of these sections indicates that both secular disequilibrium and post-depositional alteration of the sediments has resulted in inaccurate dose rate assessment for multiple samples. In particular, we suggest that multiple groundwater pulses in the Jubbah basin have caused carbonate re-precipitation and concurrent uranium enrichment in subsurface deposits, whereas ‘perched’ sections (such as the carbonate-topped remnants reported elsewhere across the Nefud) seem to be free from such alteration. These difficulties highlight important considerations for the production of chronologies from comparable settings elsewhere. Careful evaluation of all results, however, yields a robust chronology indicating the presence of varying levels of groundwater from the Holocene, MIS 3, 5, and probably older sediments from MIS 7 through to 9 or 11. We therefore provide a detailed discussion of the production of a reliable chronological framework for the Jubbah basin as an exemplar of the challenges to be overcome in such settings, and the amount of information that can be derived in so doing.Website 
• Clark-Balzan L, Parton A, Breeze PS, Groucutt HS, Petraglia MD, 'Resolving problematic luminescence chronologies for carbonate- and evaporite-rich sediments spanning multiple humid periods in the Jubbah basin, Saudi Arabia'
  Quaternary Geochronology 45 (April 2018) (2017) pp.50-73
  ISSN: 1871-1014
  Abstract Most of the world's presently hyper-arid desert regions have experienced previous periods of significantly higher humidity and milder environmental conditions. The timing of these 'greening events' is critical to research upon global climatic fluctuations and for studies of hominin palaeodemography and range expansion, contraction, and extinction, but dating these climatic shifts via terrestrial sedimentary records can be difficult. Here, we outline the challenges inherent in the radiometric dating of carbonate- and evaporite-rich sediments preserved in the Jubbah basin (Nefud Desert, northern Saudi Arabia), a critical area for reconstructing the evolution of local hydrological regimes across long timescales. The Jubbah basin is surrounded by sandstone jebels (bedrock outcrops), which have prevented significant leeward dune accumulation for at least 400,000 years. The sedimentary sequences in the basin indicate repeated fluctuations between arid and humid climatic conditions, and provide key hydroclimatic records for northern Arabia. Quartz OSL and feldspar pIRIR290 luminescence measurements and radiocarbon dating efforts are reported from four palaeoenvironmental sections in the Jubbah basin. Dates from sand-rich levels are relatively unproblematic, but significant difficulties were encountered when calculating luminescence ages from carbonate and evaporite-rich sediments. Examination of the age-depth profiles, elemental composition, and sedimentological characteristics of these sections indicates that both secular disequilibrium and post-depositional alteration of the sediments has resulted in inaccurate dose rate assessment for multiple samples. In particular, we suggest that multiple groundwater pulses in the Jubbah basin have caused carbonate re-precipitation and concurrent uranium enrichment in subsurface deposits, whereas ‘perched’ sections (such as the carbonate-topped remnants reported elsewhere across the Nefud) seem to be free from such alteration. These difficulties highlight important considerations for the production of chronologies from comparable settings elsewhere. Careful evaluation of all results, however, yields a robust chronology indicating the presence of varying levels of groundwater from the Holocene, MIS 3, 5, and probably older sediments from MIS 7 through to 9 or 11. We therefore provide a detailed discussion of the production of a reliable chronological framework for the Jubbah basin as an exemplar of the challenges to be overcome in such settings, and the amount of information that can be derived in so doing.Website 
• Groucut HS, Scerri EML, Amor K, Shipton C, Jennings RJ, Parton A, Clark-Balzan L, Alsharekh A, Petraglia MD, 'Middle Palaeolithic raw material procurement and early stage reduction at Jubbah, Saudi Arabia'
  Archaeological Research in Asia 9 (2017) pp.44-62
  ISSN: 2352-2267
  Abstract

  Several hundred Middle Palaeolithic (MP) archaeological sites have now been identified in the Arabian Peninsula. However, the study of lithic raw material properties and related procurement behaviours is still in its infancy. Here we describe raw material procurement and early stage lithic reduction at MP sites in the Jubbah palaeolake basin, in the Nefud Desert, northern Saudi Arabia. We describe the sites identified during our surveys, and we use petrographic studies to demonstrate that MP assemblages were mostly produced from differing forms of ferruginous quartzite. These raw materials do not substantially vary in composition, although they are not identical in terms of factors such as grain size and the proportion of iron oxide. We then describe the lithic technology at these sites, with a particular focus on the largest assemblage identified, Jebel Katefeh-12 (JKF-12), which provides detailed information on lithic reduction at a quartzite source. Analyses from this site are then considered together with data from other MP sites in the Jubbah basin, where similar raw material was used. The results indicate that factors such as initial clast size/shape and reduction intensity play important roles in influencing aspects of morphological and technological variability. Our results suggest that incursions of MP populations into northern Arabia were probably temporally limited, as might be expected in a marginal and generally arid region. MP raw material procurement sites provide a highly visible signal of these ephemeral incursions, providing information on the ways that human populations adapted to the challenging conditions of the Saharo-Arabian arid belt.
  

  Website 
• Engel M, Matter A, Parker AG, Parton A, Petraglia MD, Preston GW, Preusser F, 'Lakes or wetlands? A comment on ‘The middle Holocene climatic records from Arabia: Reassessing lacustrine environments, shift of ITCZ in Arabian Sea, and impacts of the southwest Indian and African monsoons’ by Enzel et al.'
  Global and Planetary Change (2016)
  ISSN: 0921-8181
  Abstract Enzel et al. (2015) reassess sedimentary records of Early to Mid-Holocene lake sites in Arabia based on a reinterpretation of published multiproxy data and a qualitative analysis of satellite imagery. The authors conclude that these sites represent palaeo-wetland environments rather than palaeolakes and that the majority of the Arabian Peninsula experienced no or, if at all, only a very minor increase of rainfall at that time mainly due to eastward expansion of the East African Summer Monsoon. We disagree with their reassessment and identify several cases where unequivocal evidence for early Late Pleistocene and Early to Mid-Holocene perennial lake environments in Arabia, lasting for centuries to millennia, was neglected by Enzel et al. (2015). Here we summarize findings which indicate the presence of lakes from the sites of Jubbah, Tayma, Mundafan (all Saudi Arabia), Wahalah, Awafi (both UAE), and the Wahiba Sands (Oman), supported by evidence including occurrence of barnacle colonies in living position, remnant bioclastic shoreline deposits, undisturbed varve formation, shallowing-up lacustrine sequences, various aquatic freshwater, brackish and saline micro- and macrofossils, such as ichnofaunal remains, which are the result of prolonged field-based research. While the precise depth, hydrology and ecology of these water bodies is still not entirely resolved, their perennial nature is indicative of a markedly increased precipitation regime, which, in
  combination with more abundant groundwater and increased spring outflow in terminal basins fed by charged aquifers, was sufficient to overcome evaporative losses. The palaeolakes’ influence on sustaining prehistoric populations is corroborated by the presence of rich archaeological evidence.Website 
• Parker A, Preston G, Parton A, Walkington H, Jardine P, Leng M, Hodson M, 'Low-latitude Holocene hydroclimate derived from lake sediment flux and geochemistry'
  Journal of Quaternary Science 31 (4) (2016) pp.286-299
  ISSN: 0267-8179
  Abstract This study investigates hydrological responses to climatic shifts using sediment flux data derived from two dated palaeolake records in southeast (SE) Arabia. Flux values are generally low during the early Holocene humid period (EHHP) (~9.0 to 6.4 k cal a BP) although several short-lived pulses of increased detrital input are recorded, the most prominent of which is dated between ~8.3 and 7.9 k cal a BP. The EHHP is separated from the mid-Holocene humid period (MHHP) (~5.0 to 4.3 k cal a BP) by a phase of increased sediment flux and aridity, which began between ~6.4 and 5.9 k cal a BP and peaked between ~5.2 and 5.0 k cal a BP. The termination of the MHHP is marked by a phase of high detrital sediment flux between ~4.3 and 3.9 k cal a BP. Whilst long-term shifts in climate are most likely linked to changes in the summer position of the Intertropical Convergence Zone (ITCZ) and associated Indian and African monsoon systems, it is noted that the abrupt, short-term phases of aridity observed in both records are coeval with intervals of rapid climate change globally, which triggered non-linear, widespread landscape reconfigurations throughout SE Arabia. 
  Website 
• Stimpson CM, Lister A, Parton A, Clark-Balzan L, Breeze PS, Drake NA, Groucutt HS, Jennings R, Scerri EM, White TS, Zahir M, 'Middle Pleistocene vertebrate fossils from the Nefud Desert, Saudi Arabia: Implications for biogeography and palaeoecology'
  Quaternary Science Reviews 143 (2016) pp.13-36
  ISSN: 0277-3791
  Abstract The current paucity of Pleistocene vertebrate records from the Arabian Peninsula – a landmass of over 3 million km2 – is a significant gap in our knowledge of the Quaternary. Such data are critical lines of contextual evidence for considering animal and hominin dispersals between Africa and Eurasia generally, and hominin palaeoecology in the Pleistocene landscapes of the Arabian interior specifically. Here, we describe an important contribution to the record and report stratigraphically-constrained fossils of mammals, birds and reptiles from recent excavations at Ti’s al Ghadah in the southwestern Nefud Desert. Combined U-series and ESR analyses of Oryx sp. teeth indicate that the assemblage is Middle Pleistocene in age and dates to ca. 500 ka. The identified fauna is a biogeographical admixture that consists of likely endemics and taxa of African and Eurasian affinity and includes extinct and extant (or related Pleistocene forms of) mammals (Palaeoloxodon cf. recki, Panthera cf. gombaszogenis, Equus hemionus, cf. Crocuta crocuta, Vulpes sp., Canis anthus, Oryx sp.), the first Pleistocene records of birds from the Arabian Peninsula (Struthio sp., Neophron percnopterus, Milvus cf. migrans, Tachybaptus sp. Anas sp., Pterocles orientalis, Motacilla cf. alba) and reptiles (Varanidae/Uromastyx sp.). We infer that the assemblage reflects mortality in populations of herbivorous animals and their predators and scavengers that were attracted to freshwater and plant resources in the inter-dune basin. At present, there is no evidence to suggest hominin agency in the accumulation of the bone assemblages. The inferred ecological characteristics of the taxa recovered indicate the presence, at least periodically, of substantial water-bodies and open grassland habitats.Website 
• Guagnin M, Jennings R, Eager H, Parton A, Stimpson C, Stepanek C, Pfeiffer M, Groucutt HS, Drake NA, Alsharekh A, Petraglia MD, 'Rock art imagery as a proxy for Holocene environmental change: A view from Shuwaymis, NW Saudi Arabia'
  Holocene 26 (11) (2016) pp.1822-1834
  ISSN: 0959-6836
  Abstract The animal species depicted in the rock art of Shuwaymis, Saudi Arabia, provide a record of Holocene climatic changes, as seen by the engravers. Of 1903 animal engravings, 1514 contained sufficient detail to allow identification with confidence. In addition, the stratigraphy of the engravings and the depiction of domesticates provide a broad chronological framework that allows a division into images created during the Holocene humid phase and animals represented after the onset of desert conditions. Despite the large sample size, only 16 animal species could be identified, which represents an extraordinarily narrow species spectrum. Comparison with the scarce faunal record of the Arabian Peninsula shows that all larger animals that are thought to have been present in the area were also depicted in the rock art. The contemporaneous presence of at least four large carnivores during the Holocene humid phase suggests that prey animals were abundant, and that the landscape consisted of a mosaic of habitats, potentially with thicker vegetation along the water courses of the wadis and more open vegetation in the landscape around them. Community Earth System Models (COSMOS) climate simulations show that Shuwaymis was at the northern edge of the African Summer Monsoon rainfall regime. It is therefore possible that Shuwaymis was ecologically connected with southwestern Arabia, and that an arid barrier remained in place to the north, restricting the dispersal of Levantine species into Arabia.Website 
• Jennings R, Singarayer J, Stone ., Krebs-Kanzow U, Khon V, Kerim H, Nisancioglu KH, Parker AG, Parton A, White T, Groucutt H, Petraglia M, 'The greening of Arabia: an ensemble of climate model simulations infers multiple opportunities for human occupation of the Arabian Peninsula during the Upper Pleistocene.'
  Quaternary International 382 (24 Sept. 2015) (2015) pp.181-199
  ISSN: 1040-6182
  Abstract Climate models are potentially useful tools for addressing human dispersals and demographic change. The Arabian Peninsula is becoming increasingly significant in the story of human dispersals out of Africa during the Late Pleistocene. Although characterised largely by arid environments today, emerging climate records indicate that the peninsula was wetter many times in the past, suggesting that the region may have been inhabited considerably more than hitherto thought. Explaining the origins and spatial distribution of increased rainfall is challenging because palaeoenvironmental research in the region is in an early developmental stage. We address environmental oscillations by assembling and analysing an ensemble of five global climate models (CCSM3, COSMOS, HadCM3, KCM, and NorESM). We focus on precipitation, as the variable is key for the development of lakes, rivers and savannas. The climate models generated here were compared with published palaeoenvironmental data such as palaeolakes, speleothems and alluvial fan records as a means of validation. All five models showed, to varying degrees, that the Arabia Peninsula was significantly wetter than today during the Last Interglacial (130 ka and 126/125 ka timeslices), and that the main source of increased rainfall was from the North African summer monsoon rather than the Indian Ocean monsoon or from Mediterranean climate patterns. Where available, 104 ka (MIS 5c), 56 ka (early MIS 3) and 21 ka (LGM) timeslices showed rainfall was present but not as extensive as during the Last Interglacial. The results favour the hypothesis that humans potentially moved out of Africa and into Arabia on multiple occasions during pluvial phases of the Late Pleistocene.Website 
• Parton A, Farrant AR, Leng MJ, Telfer MW, Groucutt HS, Petraglia MD, Parker AG, 'Alluvial fan records from southeast Arabia reveal multiple windows for human dispersal'
  Geology 43 (4) (2015) pp.295-298
  ISSN: 0091-7613 eISSN: 1943-2682
  Abstract

  The dispersal of human populations out of Africa into Arabia was most likely linked to episodes of climatic amelioration, when increased monsoon rainfall led to the activation of drainage systems, improved freshwater availability, and the development of regional vegetation. Here we present the first dated terrestrial record from southeast Arabia that provides evidence for increased rainfall and the expansion of vegetation during both glacial and interglacial periods. Findings from extensive alluvial fan deposits indicate that drainage system activation occurred during Marine Isotope Stage (MIS) 6 (ca. 160–150 ka), MIS 5 (ca. 130–75 ka), and during early MIS 3 (ca. 55 ka). The development of active freshwater systems during these periods corresponds with monsoon intensity increases during insolation maxima, suggesting that humid periods in Arabia were not confined to eccentricity-paced deglaciations, and providing paleoenvironmental support for multiple windows of opportunity for dispersal out of Africa during the late Pleistocene.

   

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• Breeze, P.S., Drake, N.A., Groucutt, H.S., Parton, A., Jennings, R.P., White, T.S., Clark-Balzan, L., Shipton, C., Scerri, E.M., Stimpson, C.M. and Crassard, R., 'Remote sensing and GIS techniques for reconstructing Arabian palaeohydrology and identifying archaeological sites'
  Quaternary International 382 (2015) pp.98-119
  ISSN: 1040-6182
  Abstract Freshwater availability is critical for human survival, and in the Saharo-Arabian desert belt repeated fluctuations between aridity and humidity over the Quaternary mean the distribution of freshwater was likely a primary control upon routes and opportunities for hominin dispersals. However, our knowledge of the spatio-temporal distribution of palaeohydrological resources within Arabia during Mid–Late Pleistocene episodes of climatic amelioration remains limited. In this paper we outline a combined method for remotely mapping the location of palaeodrainage and palaeolakes in currently arid regions that were formerly subject to more humid conditions. We demonstrate the potential of this approach by mapping palaeochannels across the whole Arabian Peninsula, and palaeolakes and marshes for select regions covering c. 10% of its surface. Our palaeodrainage mapping is based upon quantitative thresholding of HydroSHEDs data, which applies flow routing to Digital Elevation Model (DEM) data, while our palaeolake mapping uses an innovative method where spectral classification of Landsat Thematic Mapper (TM) imagery is used to detect palaeolake deposits within endorheic (closed) basins, before modelling maximum lake extents by flooding the basin to the level of the elevation of the highest detected deposit. Field survey in the Nefud desert and the Dawadmi and Shuwaymis regions of Saudi Arabia indicates accuracies of 86% for palaeodrainage mapping, and 96% for identifying former palaeolake basins (73% accuracy of classification of individual deposits). The palaeolake mapping method has also demonstrated potential for identifying surface and stratified archaeological site locations, with 76% of the surveyed palaeolake basins containing archaeological material, including stratified Palaeolithic archaeology. Initial examination of palaeodrainage in relation to archaeological sites indicates a relationship between mapped features and previously recorded Palaeolithic sites. An example of the application of these data for period-specific regional palaeohydrological and archaeological reconstructions is presented for a region of Northern Saudi Arabia covering the southern Nefud desert and adjacent lava fields.Website 
• Farrant AR, Duller GAT, Parker AG, Parton A, Roberts HM, Knox RWO, Bide T, 'Developing a framework of Quaternary dune accumulation in the northern Rub' al-Khali, Arabia'
  Quaternary International 382 (2015) pp.132-144
  ISSN: 1040-6182
  Abstract Located at the crossroads between Africa and Eurasia, Arabia occupies a pivotal position for human migration and dispersal during the Late Pleistocene. Deducing the timing of humid and arid phases is critical to understanding when the Rub' al-Khali desert acted as a barrier to human movement and settlement. Recent geological mapping in the northern part of the Rub' al-Khali has enabled the Quaternary history of the region to be put into a regional stratigraphical framework. In addition to the active dunes, two significant palaeodune sequences have been identified. Dating of key sections has enabled a chronology of dune accretion and stabilisation to be determined. In addition, previously published optically stimulated luminescence (OSL) dates have been put in their proper stratigraphical context, from which a record of Late Pleistocene dune activity can be constructed. The results indicate the record of dune activity in the northern Rub' al-Khali is preservation limited and is synchronous with humid events driven by the incursion of the Indian Ocean monsoon.Website 
• Groucutt, H.S., Petraglia, M.D., Bailey, G., Scerri, E.M., Parton, A., Clark‐Balzan, L., Jennings, R.P., Lewis, L., Blinkhorn, J., Drake, N.A. and Breeze, P.S., 'Rethinking the dispersal of Homo sapiens out of Africa'
  Evolutionary Anthropology 24 (4) (2015) pp.149-164
  ISSN: 1060-1538 eISSN: 1520-6505
  Abstract Current fossil, genetic, and archeological data indicate that Homo sapiens originated in Africa in the late Middle Pleistocene. By the end of the Late Pleistocene, our species was distributed across every continent except Antarctica, setting the foundations for the subsequent demographic and cultural changes of the Holocene. The intervening processes remain intensely debated and a key theme in hominin evolutionary studies. We review archeological, fossil, environmental, and genetic data to evaluate the current state of knowledge on the dispersal of Homo sapiens out of Africa. The emerging picture of the dispersal process suggests dynamic behavioral variability, complex interactions between populations, and an intricate genetic and cultural legacy. This evolutionary and historical complexity challenges simple narratives and suggests that hybrid models and the testing of explicit hypotheses are required to understand the expansion of Homo sapiens into Eurasia.Website 
• Groucutt HS, White TS, Clark-Balzan L, Parton A, Crassard R, Shipton C, Jennings RP, Parker AG, Breeze PS, Scerri EML, Alsharekh A, Petraglia MD, 'Human occupation of the Arabian Empty Quarter during MIS 5: evidence from Mundafan Al-Buhayrah, Saudi Arabia'
  Quaternary Science Reviews 119 (1 July 2015) (2015) pp.116-135
  ISSN: 0277-3791
  Abstract
  The Empty Quarter (or Rub' al Khali) of the Arabian Peninsula is the largest continuous sandy desert in the world. It has been known for several decades that Late Pleistocene and Holocene deposits, representing phases of wetter climate, are preserved there. These sequences have yielded palaeontological evidence in the form of a variety of vertebrate and invertebrate fossils and have been dated using various radiometric techniques. However, evidence for human presence during these wetter phases has until now been ephemeral. Here, we report on the first stratified and dated archaeology from the Empty Quarter, recovered from the site of Mundafan Al-Buhayrah (MDF-61). Human occupation at the site, represented by stone tools, has been dated to the later part of Marine Isotope Stage (MIS) 5 using multiple luminescence dating techniques (multigrain and single grain OSL, TT-OSL). The sequence consists primarily of lacustrine and palustrine sediments, from which evidence for changing local environmental conditions has been obtained through analysis of fossil assemblages (phytoliths and non-marine molluscs and ostracods). The discovery of securely-dated archaeological material at ∼100 to 80 ka in the Empty Quarter has important implications for hypotheses concerning the timing and routes of dispersal of Homo sapiens out of Africa, which have been much debated. Consequently, the data presented here fill a crucial gap in palaeoenvironmental and archaeological understanding of the southern Arabian interior. Fossils of H. sapiens in the Levant, also dated to MIS 5, together with Middle Palaeolithic archaeological sites in Arabia and India are thought to represent the earliest dispersal of our species out of Africa. We suggest that the widespread occurrence of similar lithic technologies across southern Asia, coupled with a growing body of evidence for environmental amelioration across the Saharo-Arabian belt, indicates that occupation of the Levant by H. sapiens during MIS 5 may not have been a brief, localized ‘failed dispersal’, but part of a wider demographic expansion.
  Website 
• Jennings, R.P., Shipton, C., Breeze, P., Cuthbertson, P., Bernal, M.A., Wedage, W.O., Drake, N.A., White, T.S., Groucutt, H.S., Parton, A. and Clark-Balzan, L., 'Multi-scale Acheulean landscape survey in the Arabian Desert'
  Quaternary International (2015)
  ISSN: 1040-6182
  Website 
• Hilbert, Y.H., Parton, A., Morley, M.W., Linnenlucke, L.P., Jacobs, Z., Clark-Balzan, L., Roberts, R.G., Galletti, C.S., Schwenninger, J.L. and Rose, J.I., 'Terminal Pleistocene and Early Holocene archaeology and stratigraphy of the southern Nejd, Oman'
  Quaternary International (2015)
  ISSN: 1040-6182
  Website 
• Groucutt, H.S., Scerri, E.M., Lewis, L., Clark-Balzan, L., Blinkhorn, J., Jennings, R.P., Parton, A. and Petraglia, M.D., 'Stone tool assemblages and models for the dispersal of Homo sapiens out of Africa'
  Quaternary International 382 (2015) pp.8-30
  ISSN: 1040-6182
  Abstract The dispersal of Homo sapiens out of Africa has been extensively researched across several disciplines. Here we review the evidence for spatial and temporal variability in lithic (stone tool) technologies relative to the predictions of two major hypotheses: 1) that a single successful dispersal occurred 60–50 thousand years ago (ka), marked by a trail of geometric/microlithic technologies, and 2) that multiple dispersals occurred, beginning much earlier (probably in Marine Isotope Stage [MIS] 5), associated with Middle Palaeolithic technology in its early phase. Our results show that Late Pleistocene geometric/microlithic technologies exhibit significant temporal and regional differences between each other. These differences suggest independent, convergent origins for these technologies, which are likely to have been repeatedly re-invented. In contrast, we identify similarities between East African lithic technologies from MIS 8 onwards and Middle Palaeolithic assemblages as far east as India by MIS 5. That this constellation of technological features – particularly an emphasis on centripetal Levallois reduction reflecting interchangeable preferential and recurrent methods, along with particular retouched forms such as points – transcends ecologies and raw material types suggests that it is unlikely to entirely reflect technological convergence (analogy). Our results indicate an early onset of multiple dispersals out of Africa. The hypothesis of an early onset to successful dispersal is entirely consistent with the possibility of further subsequent (post-MIS 5) dispersals out of Africa. Testing such hypotheses through quantified comparative lithic studies and interdisciplinary research is therefore likely to significantly advance understanding of the earliest H. sapiens dispersals.Website 
• Parton A, White TS, Parker AG, Breeze PS, Jennings R, Groucutt HS, Petraglia MD, 'Orbital-scale climate variability in Arabia as a potential motor for human dispersals.'
  Quaternary International 382 (2015) pp.82-97
  ISSN: 1040-6182
  Abstract The Arabian Peninsula is situated at an important crossroads for the movement of Pleistocene human populations out of, and into, Africa. Although the timings, routes and frequencies of such dispersals have not yet been confirmed by genetic, fossil or archaeological evidence, expansion into Arabia would have been facilitated by humid periods driven by incursions of monsoon rainfall, potentially from both Indian Ocean and African monsoon systems. Here we synthesise terrestrial and marine core palaeoclimatic data in order to establish the spatial and temporal variability of humid periods in Arabia between late Marine Isotope Stage (MIS) 7 and 3. Incursions of monsoon rainfall occurred during periods of insolation maxima at ca. 200–190, 170, 155, 130–120, 105–95, 85–75 and 60–55 ka, providing multiple ‘windows’ of favourable climatic conditions that could have facilitated demographic expansion through Arabia. Strong summer monsoons are generally associated with mid-high latitude interglacials, however, enhanced monsoon convection also brought rainfall into Arabia during global glacial phases, possibly due to a strengthened winter monsoon and a greater influence of southern hemispheric temperature changes. Key periods for dispersal into northern regions of Arabia correspond with the synchronous intensification of both eastern Mediterranean and monsoon rainfall systems at insolation maxima during MIS 7 and MIS 5, which may have facilitated demographic connectivity between the Levant and the Arabian interior. Environmental conditions throughout southern and southeast regions were also favourable to expansion during these times, although strong monsoons in these regions during MIS 6 and MIS 3 suggest further opportunities for demographic expansion and exchange. Terrestrial and marine evidence show that during early MIS 3 (ca. 60–50 ka), a strengthened monsoon led to the activation of interior drainage systems and increased productivity in coastal zones, indicating that favourable environmental conditions existed along both coastal and interior routes at that time.Website 
• Stimpson, C.M., Breeze, P.S., Clark-Balzan, L., Groucutt, H.S., Jennings, R., Parton, A., Scerri, E., White, T.S. and Petraglia, M.D., 'Stratified Pleistocene vertebrates with a new record of a jaguar-sized pantherine (Panthera cf. gombaszogensis) from northern Saudi Arabia'
  Quaternary International 382 (2015) pp.168-180
  ISSN: 1040-6182
  Abstract The reconstruction of Pleistocene faunas and environments of the Arabian Peninsula is critical to understanding faunal exchange and dispersal between Africa and Eurasia. However, the documented Quaternary vertebrate record of the Peninsula is currently sparse and poorly understood. Small collections have provided a rare insight into the Pleistocene vertebrate communities of northern Arabia, but the chronostratigraphic context of these collections is not clear. Resolving the taxonomic and chronostratigraphic affinities of this fauna is critical to emerging Quaternary frameworks.
   
  Here, we summarise recent investigations of the fossiliferous locality of Ti's al Ghadah in the southwestern Nefud. Excavations yielded well-preserved fossil bones in a secure stratigraphic context, establishing the potential of this site to make a significant contribution to our understanding of vertebrate diversity and biogeography in the Pleistocene of Arabia. We describe the site and report our preliminary observations of newly-recovered stratified vertebrate remains, at present dated to the Middle Pleistocene, which include oryx (Oryx sp.), fox (Vulpes sp.), and notably stratified remains of the Elephantidae and a grebe (Tachybaptus sp.). Here, we give special attention to post-cranial evidence that confirms the presence of a jaguar-sized pantherine, which we refer to the Eurasian jaguar (Panthera cf. gombaszogensis). The occurrence of this taxon during the Middle Pleistocene has important implications for existing biostratigraphical and biogeographical models and for palaeoecological reconstructions of the southern Nefud at that time.
  Website 

Book chapters

• Parker AG, Armitage SJ, Engel M, Morley MW, Parton A, Preston GW, Russ H, 'Geomorphology, Geoarcheology and Paleoenvironments' in Philipp Drechsler (ed.), Dosariyah Reinvestigating a Neolithic coastal community in eastern Arabia, Archaeopress Publishing Ltd (2018)
  ISBN: 9781784919627 eISBN: 9781784919634 (e-Pdf)
  Website 

Further information

http://www.bbc.co.uk/earth/story/20150223-arabia-was-once-a-lush-paradise

https://www.sciencedaily.com/releases/2015/02/150220083718.htm

http://britgeopeople.blogspot.co.uk/2015/02/was-arabia-once-lush-paradiseby-dr-ash.html