The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Photographer: Helen Groger-wurm - One of the best experts on this subject based on the ideXlab platform.
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Egypt - Sphinx
2019Co-Authors: Photographer: Helen Groger-wurmAbstract:Great Sphinx of Giza and Pyramid of Khafre in the distance. People in foreground include Helen Gregor-Wurm (right) and Stephen Gregor-Wurm (left of Helen Gregor-Wurm)
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Alice - Darwin - anthill, 125 miles after Katherine
2019Co-Authors: Photographer: Helen Groger-wurmAbstract:Stephen Wurm beside giant termite mound
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Lithgow - Kurrajong (Bell Road)
2019Co-Authors: Photographer: Helen Groger-wurmAbstract:Helen Groger-Wurm
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Mexico - Mexico City - National Autonomous University of Mexico
2019Co-Authors: Photographer: Helen Groger-wurmAbstract:Stephen Wurm in foreground
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Ayers Rock - The Climb
2019Co-Authors: Photographer: Helen Groger-wurmAbstract:Uluru. Helen Groger-Wurm
Kazanci - One of the best experts on this subject based on the ideXlab platform.
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Quaternary colluvium in west-central Anatolia: sedimentary facies and palaeoclimatic significance
Sedimentology, 1999Co-Authors: Nemec, KazanciAbstract:The Quaternary colluvial aprons in Lake Egirdir area, Taurus Mountains, consist of steep coalescent fans, up to 17–20 m thick and 350–450 m in plan-view radius, and the sedimentary succession comprises four lithostratigraphic divisions. The basal red–brown colluvium consists of a chaotic, bouldery fan-core rubble covered with bedded, openwork to matrix-rich gravel, whose deposition is attributed to rockfalls and cohesive debrisflows, with minor grainflows and sheetwash processes. The middle part of this division contains interbeds of early Pleistocene tephra. The overlying light-grey colluvium consists of bedded gravel with numerous palaeogullies and its deposition is attributed to waterflow, rockfalls and cohesive debrisflows. The younger, medium-grey colluvium consists of stratified pebbly sand interspersed with cobble/boulder gravel and its deposition is attributed to sheetwash processes accompanied by rockfalls and wet snowflows/slushflows. A bulk-pollen radiocarbon date indicates Late Wurm age. The youngest, yellow–grey colluvium consists of bedded, mainly pebbly and openwork gravel, whose deposition is attributed to dry grainflows, rockfalls and minor cohesive debrisflows. Based on the sedimentary facies assemblages and available isotopic dates, the four colluvial divisions are correlated with the following stages of the region’s climatic history: (1) the latest Pliocene to Early Pleistocene stage of warm–humid climate with pronounced phases of drier conditions; (2) the Late Pleistocene stage of colder climate, with alternating phases of higher and lower humidity; (3) the last glacial (Wurm) stage of coldest climate; and (4) the Holocene stage of warm semi-arid climate. It is concluded that colluvial depositional systems bear a valuable proxy record of climatic changes and regional geoclimatic differences.
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Quaternary colluvium in west-central Anatolia: sedimentary facies and palaeoclimatic significance
Sedimentology, 1999Co-Authors: Nemec, KazanciAbstract:The Quaternary colluvial aprons in Lake Egirdir area, Taurus Mountains, consist of steep coalescent fans, up to 17–20 m thick and 350–450 m in plan-view radius, and the sedimentary succession comprises four lithostratigraphic divisions. The basal red–brown colluvium consists of a chaotic, bouldery fan-core rubble covered with bedded, openwork to matrix-rich gravel, whose deposition is attributed to rockfalls and cohesive debrisflows, with minor grainflows and sheetwash processes. The middle part of this division contains interbeds of early Pleistocene tephra. The overlying light-grey colluvium consists of bedded gravel with numerous palaeogullies and its deposition is attributed to waterflow, rockfalls and cohesive debrisflows. The younger, medium-grey colluvium consists of stratified pebbly sand interspersed with cobble/boulder gravel and its deposition is attributed to sheetwash processes accompanied by rockfalls and wet snowflows/slushflows. A bulk-pollen radiocarbon date indicates Late Wurm age. The youngest, yellow–grey colluvium consists of bedded, mainly pebbly and openwork gravel, whose deposition is attributed to dry grainflows, rockfalls and minor cohesive debrisflows. Based on the sedimentary facies assemblages and available isotopic dates, the four colluvial divisions are correlated with the following stages of the region’s climatic history: (1) the latest Pliocene to Early Pleistocene stage of warm–humid climate with pronounced phases of drier conditions; (2) the Late Pleistocene stage of colder climate, with alternating phases of higher and lower humidity; (3) the last glacial (Wurm) stage of coldest climate; and (4) the Holocene stage of warm semi-arid climate. It is concluded that colluvial depositional systems bear a valuable proxy record of climatic changes and regional geoclimatic differences.
Nemec - One of the best experts on this subject based on the ideXlab platform.
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Quaternary colluvium in west-central Anatolia: sedimentary facies and palaeoclimatic significance
Sedimentology, 1999Co-Authors: Nemec, KazanciAbstract:The Quaternary colluvial aprons in Lake Egirdir area, Taurus Mountains, consist of steep coalescent fans, up to 17–20 m thick and 350–450 m in plan-view radius, and the sedimentary succession comprises four lithostratigraphic divisions. The basal red–brown colluvium consists of a chaotic, bouldery fan-core rubble covered with bedded, openwork to matrix-rich gravel, whose deposition is attributed to rockfalls and cohesive debrisflows, with minor grainflows and sheetwash processes. The middle part of this division contains interbeds of early Pleistocene tephra. The overlying light-grey colluvium consists of bedded gravel with numerous palaeogullies and its deposition is attributed to waterflow, rockfalls and cohesive debrisflows. The younger, medium-grey colluvium consists of stratified pebbly sand interspersed with cobble/boulder gravel and its deposition is attributed to sheetwash processes accompanied by rockfalls and wet snowflows/slushflows. A bulk-pollen radiocarbon date indicates Late Wurm age. The youngest, yellow–grey colluvium consists of bedded, mainly pebbly and openwork gravel, whose deposition is attributed to dry grainflows, rockfalls and minor cohesive debrisflows. Based on the sedimentary facies assemblages and available isotopic dates, the four colluvial divisions are correlated with the following stages of the region’s climatic history: (1) the latest Pliocene to Early Pleistocene stage of warm–humid climate with pronounced phases of drier conditions; (2) the Late Pleistocene stage of colder climate, with alternating phases of higher and lower humidity; (3) the last glacial (Wurm) stage of coldest climate; and (4) the Holocene stage of warm semi-arid climate. It is concluded that colluvial depositional systems bear a valuable proxy record of climatic changes and regional geoclimatic differences.
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Quaternary colluvium in west-central Anatolia: sedimentary facies and palaeoclimatic significance
Sedimentology, 1999Co-Authors: Nemec, KazanciAbstract:The Quaternary colluvial aprons in Lake Egirdir area, Taurus Mountains, consist of steep coalescent fans, up to 17–20 m thick and 350–450 m in plan-view radius, and the sedimentary succession comprises four lithostratigraphic divisions. The basal red–brown colluvium consists of a chaotic, bouldery fan-core rubble covered with bedded, openwork to matrix-rich gravel, whose deposition is attributed to rockfalls and cohesive debrisflows, with minor grainflows and sheetwash processes. The middle part of this division contains interbeds of early Pleistocene tephra. The overlying light-grey colluvium consists of bedded gravel with numerous palaeogullies and its deposition is attributed to waterflow, rockfalls and cohesive debrisflows. The younger, medium-grey colluvium consists of stratified pebbly sand interspersed with cobble/boulder gravel and its deposition is attributed to sheetwash processes accompanied by rockfalls and wet snowflows/slushflows. A bulk-pollen radiocarbon date indicates Late Wurm age. The youngest, yellow–grey colluvium consists of bedded, mainly pebbly and openwork gravel, whose deposition is attributed to dry grainflows, rockfalls and minor cohesive debrisflows. Based on the sedimentary facies assemblages and available isotopic dates, the four colluvial divisions are correlated with the following stages of the region’s climatic history: (1) the latest Pliocene to Early Pleistocene stage of warm–humid climate with pronounced phases of drier conditions; (2) the Late Pleistocene stage of colder climate, with alternating phases of higher and lower humidity; (3) the last glacial (Wurm) stage of coldest climate; and (4) the Holocene stage of warm semi-arid climate. It is concluded that colluvial depositional systems bear a valuable proxy record of climatic changes and regional geoclimatic differences.
Sameh M Shaddad - One of the best experts on this subject based on the ideXlab platform.
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buried palaeosols of nw sardinia italy as archives of the late quaternary climatic fluctuations
Catena, 2014Co-Authors: Claudio Zucca, Stefano Andreucci, Ihsan Aksit, Y K Koca, Salvatore Madrau, Vincenzo Pascucci, Franco Previtali, Sameh M ShaddadAbstract:Abstract A multi-disciplinary approach was performed to investigate two compound geosols included between wind-blown deposits at the top, and interglacial (MIS 5) beach sediments at the bottom, located along the Alghero coast (North-western Sardinia, Italy). A sedimentological and morphological study was carried out on the profile in the field, and samples collected on the main pedomembers were subjected to several laboratory analyses, consisting of physical and chemical determinations on bulk samples, mineralogy (XRD), micromorphology on undisturbed samples (thin Section, SEM), and EDAX-micro probe analyses. Dating was performed by means of Optically Stimulated Luminescence (OSL). The studied geosols show the evidence of a complex pedosedimentary evolution. Around 80 to 70 ka the lower geosol underwent weathering and clay illuviation (wet and warm conditions), followed by calcification-recalcification processes (dry-contrasted), and finally by strong bioturbation. Around 70 ka the onset of the glacial period (MIS 4) is marked by the deposition of a sand dune, capping the lower geosol. These results indicate that the coastal area of the central Mediterranean kept the relatively warm conditions typical of the interglacial climate for most of the Early Wurm and reached cold conditions only at about 70 ka, possibly in relation to the rapid cooling of the Heinrich event H7. The upper geosol developed on colluvial material including abundant pedorelicts and reddish earth material, deposited around 50 ka. Before being buried by aeolian sand around 43 ka, this deposit underwent pedogenesis phases possibly associated to Middle Wurm interstadial events, indicating that in the study area these events were intense enough to influence pedogenesis.
Jeanluc Guadelli - One of the best experts on this subject based on the ideXlab platform.
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les cerfs du Wurm ancien en aquitaine
Paleobiology, 1996Co-Authors: Jeanluc GuadelliAbstract:En se fondant sur les etudes morphologique et biometrique des restes des deux Cerfs provenant de niveaux archeologiques dates du Wurm ancien, nous avons mis en evidence que la forme de petite taille devait etre distinguee du grand elaphe et rapportee a une nouvelle espece Cervus simplicidens. Il apparait egalement que les exigences ecologiques des deux especes sont differentes.
