Results 101 to 110 of about 14,168 (295)

What can lithics tell us about hominin technology's ‘primordial soup’? An origin of stone knapping via the emulation of Mother Nature

Archaeometry, EarlyView.
Abstract The use of stone hammers to produce sharp stone flakes—knapping—is thought to represent a significant stage in hominin technological evolution because it facilitated the exploitation of novel resources, including meat obtained from medium‐to‐large‐sized vertebrates. The invention of knapping may have occurred via an additive (i.e., cumulative)
Metin I. Eren, Stephen J. Lycett, Michelle R. Bebber, Alastair Key, Briggs Buchanan, Emma Finestone, Joseph Benson, Rebecca Biermann Gürbüz, Adela Cebeiro, Roman Garba, Anne Grunow, C. Owen Lovejoy, Danielle MacDonald, Erica Maletic, G. Logan Miller, Joseph D. Ortiz, Jonathan Paige, Justin Pargeter, Tomos Proffitt, Mary Ann Raghanti, Teal Riley, Jeffrey I. Rose, David M. Singer, Robert S. Walker   +23 more
wiley   +1 more source

Waterborne and on-land electrical surveys to suggest the geological evolution of a glacial lake in NW Italy [PDF]

, 2014
Geophysical surveys on and around the Candia Lake, located NE of Turin (NW Italy), in the internal depression of the Ivrea Morainic Amphitheatre (IMA) right frontal sector, are reported in this paper.
Allen, Archie, Auken, Befus, Benn, Bennett, Bradbury, Butler, Cesare Comina, Chiara Colombero, Ciampittiello, Evans, Feenstra, Franco Gianotti, Friedman, Gianotti, Gilbert, Goldthwait, Goto, Grangeia, Hayashi, Ingeman-Nielsen, Ishido, Ivy-Ochs, Kelly, Kostic, Kwon, Lami, Loke, Loke, Luigi Sambuelli, Lønne, Mitchell, Monegato, Oerlemans, Pini, Ravazzi, Rucker, Sambuelli, Sambuelli, Sambuelli, Telford, Thompson, Trique, Tu, Vescovi, Wagner   +46 more
core   +1 more source

Soil wetting and drying processes influence stone artefact distribution in clay‐rich soils: A case study from Middle Gidley Island in Murujuga, northwest Western Australia

Archaeometry, EarlyView.
Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather, Matthias Leopold, Kaitlin Sullivan, Kane Ditchfield, Tom Horrocks, Luke Gliganic, Emma Beckett, Diana Patalwala, Emielda Yusiharni, Michael Smirk, William Hiscock, Jo McDonald   +11 more
wiley   +1 more source

Gravity modelling of ice thickness and valley geometry on Taku Glacier (T'aak̲ú K̲wáan Sít'i), Alaska

Journal of Glaciology
Taku Glacier recently began retreating for the first time since the late 19th century but limited observations of its bed leaves uncertainties on how this retreat will proceed. In this study, we use ground-based gravity measurements to improve the extent
Louise Borthwick, Atsuhiro Muto, Kirsty Tinto   +2 more
doaj   +1 more source

Ice thickness measurements of Guliya ice cap, western Kunlun Mountains (Tibetan Plateau), China

Journal of Glaciology, 2018
Despite their high value and importance for various glaciological applications, detailed ice thickness measurements of alpine glaciers are still very limited. Knowledge of bedrock topography is essential for paleoglaciological studies. The Guliya ice cap
STANISLAV KUTUZOV, LONNIE G. THOMPSON, IVAN LAVRENTIEV, LIDE TIAN   +3 more
doaj   +1 more source

A preliminary Scanning Electron Microscope (SEM) study of magnetite surface microtextures from the Wahianoa moraines, Mt Ruapehu, New Zealand. [PDF]

, 2010
Scanning electron microscope (SEM) of quartz micro‐textures has routinely been used to identify the depositional environment of sediments in areas of former ice‐sheet glaciation.
Brook, Martin S, Mandolla, Stephanie
core  

Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites [PDF]

, 2013
Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian–early Bashkirian).
Gulbranson, Erik L., Hull, Clara, Isbell, John L., Limarino, Carlos Oscar, Marenssi, Sergio Alfredo, Meyer, Kyle, Montañez, Isabel P.   +6 more
core   +1 more source

Assessing the Vulnerability of an Inuit Archaeological Site in a Changing Periglacial Environment: A Novel Multimethod Geophysical Approach in Arctic Geoarchaeology

Archaeometry, EarlyView.
ABSTRACT With northern regions warming at twice the global rate, assessing the state of archaeological sites in these areas is critically important. In this study, we used a multimethod geophysical approach (ERT, GPR, and EMI) to characterize the current geocryological conditions of an Inuit archaeological site on South Aulatsivik Island (Labrador ...
Rachel Labrie, Dominique Todisco, Najat Bhiry, Cécile Finco, Héloïg Barbel Le Page, Armelle Couillet   +5 more
wiley   +1 more source

Glacier bed surveying with helicopter-borne dual-polarization ground-penetrating radar

Journal of Glaciology, 2019
Traditionally, helicopter-borne ground-penetrating radar (GPR) systems are operated with a single pair of bistatic dipole antennas to measure the thickness of glaciers.
LISBETH LANGHAMMER, LASSE RABENSTEIN, LINO SCHMID, ANDREAS BAUDER, MELCHIOR GRAB, PHILIPP SCHAER, HANSRUEDI MAURER   +6 more
doaj   +1 more source

Origin and structure of Devensian depressions at Letton, Herefordshire [PDF]

, 2010
Groups of circular to oval enclosed depressions in soft sediments of Pleistocene age are relatively common in north-west Europe. These features are normally interpreted as being either glacial or periglacial in origin.
Astin, Timothy Robin, Griffiths, Geoffrey Hugh, Gurney, Stephen David   +2 more
core