Results 41 to 50 of about 313 (146)

Investigating sediment dynamics and landscape change processes in the semi‐arid Pilbara, Western Australia – Insights using paired cosmogenic 26Al/10Be ratios

Earth Surface Processes and Landforms, Volume 50, Issue 10, August 2025.
Cosmogenic 26Al/10Be ratios are used to quantify the spatial–temporal processes of landscape change in the Pilbara since the Plio‐Pleistocene. We compare long‐term catchment denudation rates from bedrock and river sediments and explore the potential mechanisms underlying their complex exposure history through a source‐to‐sink approach.
Alissa Flatley, Jan‐Hendrik May, Toshiyuki Fujioka, Ian Rutherfurd, David Fink   +4 more
wiley   +1 more source

Heterogenous Si Isotopic Composition in Coastal Groundwater: Controls on Dissolved Silicon and Groundwater Discharge Along Indian Coastline

Global Biogeochemical Cycles, Volume 39, Issue 8, August 2025.
Abstract We report stable silicon isotope ratio (δ30Si) of over 80 groundwater samples collected along the Indian coast, spanning a wide range of aquifer lithologies (alluvial, basalt, metamorphic, laterite and limestone), climate (semi‐arid to tropical wet) and land use settings.
Sarath Pullyottum Kavil, Jean Riotte, Ramananda Chakrabarti, V. V. S. S. Sarma, B. S. K. Kumar, J. Prunier, Arnaud Dapoigny, Damien Cardinal   +7 more
wiley   +1 more source

Geochemical mass-balance and oxygen-isotope constrains on silcrete formation and its paleoclimatic implications in Southern Australia

, 1998
Two geographically distinct silcrete associations are present in southern Australia, inland and eastern; these were sampled in central South Australia and central Victoria, respectively, At each site, both silicified and immediately adjacent unsilicified
D. Golding, Webb, JA, Golding, SD, John A. Webb, Suzanne   +4 more
core   +1 more source

A Late Pleistocene Human Pedal Phalanx From the Pinnacle Point PP5‐6N Rock‐Shelter, Western Cape Province, South Africa

American Journal of Biological Anthropology, Volume 187, Issue 3, July 2025.
ABSTRACT Objectives This study provides the description and comparative morphometric analysis of a non‐hallucial distal pedal phalanx (PP 654270) excavated from near the base of the LBSR Stratigraphic Aggregate in the Pinnacle Point PP5‐6N rock‐shelter.
Adrián Pablos, Frederick E. Grine, Naomi Cleghorn, Katherine Elmes, Carrie S. Mongle, Curtis W. Marean   +5 more
wiley   +1 more source

Lithic record in sources of supply of sites from The Ranchito, province of Córdoba [PDF]

, 2019
En este trabajo se presenta un estudio tecno-morfológico sobre conjuntos líticos de diversas materias primas, entre ellas silcretes, rocas volcánicas/subvolcánicas, cuarzos y metacuarcitas, procedentes de siete cuadrículas de recolección de los sitios ...
Sario, Gisela M., Costantino, Florencia Natalia, Sario, Gisela, Sario, Gisela Mariela, Costantino, Florencia   +4 more
core   +1 more source

Multi‐Century Grindstone Quarrying at Brumby Yard, Queensland

Archaeology in Oceania, Volume 60, Issue 2, Page 176-186, July 2025.
ABSTRACT The timing and duration of prehistoric quarrying is poorly understood within Australia, with limited ages available for quarries owing to the difficulties in dating these rock‐sediment constructions. We report the first multi‐sample, optically stimulated luminescence ages from quarry pits in Brumby Yard, an Aboriginal grindstone quarry ...
Kieran McGee, Justine Kemp, Joshua Gorringe, George Gorringe, Trudy Gorringe   +4 more
wiley   +1 more source

Detrital gold morphology and recycling around the early Miocene St Bathans paleovalley, Central Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 2, Page 245-259, June 2025.
ABSTRACT The St Bathans paleovalley developed as a major southwest‐draining fluvial system during early Miocene rejuvenation of the Central Otago landscape. Rounded quartz pebbles and detrital gold were recycled from Eocene quartz pebble conglomerates into the headwaters of this Miocene paleodrainage system on the northern margin of the Otago Schist ...
Marshall Palmer, Dave Craw
wiley   +1 more source

Origin and evolution of silcretes

, 2010
Summary: Silcretes are rocks with high content of SiO2 (usually more than 90 wt. %) formed by mobilization of SiO2 during weathering processes. Silcretes formed near the Earth's surface by soil weathering in warm and humid climate are termed as pedogenic
Kohoutová, Iveta
core  

Understanding the Depositional History of the Archaeological Open‐Air Site, Klein Hoek 1, South Africa, Using Geophysical Geoarchaeology

Geoarchaeology, Volume 40, Issue 3, May/June 2025.
ABSTRACT Archaeological field research in South African archaeology has been dominated by rock shelters. While rock shelters provide the advantage of a defined area of investigation and more limited processes of erosion and sediment accumulation, they only capture part of the archaeological, environmental and landscape records.
Oliver Hatswell, Ian Moffat, Christopher J. H. Ames, Matthew Shaw, Natasha Phillips, Jessica‐Louise McNeil, Brian G. Jones, Alex Mackay   +7 more
wiley   +1 more source

The Greater Bilby (Macrotis lagotis) in Queensland, Australia: Distribution, Trends, and Threats

Austral Ecology, Volume 50, Issue 4, April 2025.
ABSTRACT Medium‐sized Australian mammals have suffered major declines since colonisation, with many now extinct or surviving only in intensively managed, predator‐free fenced reserves or on islands. The greater bilby (Macrotis lagotis) in Queensland is an anomaly, persisting primarily in grazed rangelands with no targeted conservation management across
J. L. Silcock, A. J. Healy, K. Bradley, C. Arkinstall, R. Seaton, R. I. Southgate   +5 more
wiley   +1 more source