Results 51 to 60 of about 2,620 (191)
The Comminution of Chert Gravel by Microwave Irradiation
ResourcesChert, a by-product rock of sand quarrying, has historically posed economic challenges for aggregate production, resulting in significant “waste” accumulation in quarries.
Mark Tzibulsky, Vladimir Frid
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Sedimentology, EarlyView.ABSTRACT Although the global expansion of oxygen‐depleted marine environments during the Early Toarcian Jenkyns Event (or Toarcian Oceanic Anoxic Event) is primarily inferred from successions in the NW European epicontinental basins, the timing of the expansion of anoxia in Tethyan basins, where hydrography potentially played a minor role, is poorly ...
Tamás Müller +6 more
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Sedimentology, EarlyView.ABSTRACT Thermodynamic constraints and empirical evidence often suggest that fabric‐retentive replacement dolomites are stable carbonate minerals that preserve ancient seawater properties. This study evaluates this hypothesis by examining the Upper Triassic Dolomia Principale in Northern Italy.
Vivien Folliot +8 more
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Sedimentology, EarlyView.ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska +4 more
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New data about Cenomanian and Turonian chert from the Charente basin (France)
Journal of Lithic Studies, 2014 Prehistoric studies in lithic raw materials have experienced some methodological innovations that have resulted in research breakthroughs. The transfer of methods from Geology to Archaeology has led to the development of a new discipline, Petroarcheology,
Mar Rey-Solé +2 more
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The Sedimentary Origin of Black and White Banded Cherts of the Buck Reef, Barberton, South Africa
Geosciences, 2019 The Buck Reef is a 250−400 m thick sequence of banded black and white (B&W) cherts deposited ca. 3416 Ma ago in a shallow basin. We provide field, petrological and geochemical constraints on the chert-forming process and the origin of the ...
Morgane Ledevin +4 more
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Geochemistry, Geophysics, GeosystemsThe presence of fluid plays a critical role in controlling the fault slips and the seismogenesis in subduction zones. However, the origins and pathways of the fluid remain poorly understood.
Hanaya Okuda +6 more
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Geologija, 2017 The village of Crngrob (central Slovenia) is known to geologists for the silicifid fossils found in the thick soil covering the “Amphiclina beds”, a Carnian lithostratigraphic unit of the Mesozoic Slovenian Basin.
Luka Gale +4 more
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Late Cenozoic Sediment Provenance in the Northern Canterbury Basin, Aotearoa New Zealand
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.Late Cenozoic strata of the northern Canterbury Basin record uplift and erosion of mountain ranges adjacent to the transition from oblique subduction to strike‐slip on the Australian–Pacific plate boundary. Using the provenance of conglomerate clasts and sandstone samples, we reconstruct sediment transport pathways and, by inference, exhumation and ...
Matthew O. Parker +5 more
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A Robust AHP–GIS Based Flood Susceptibility Mapping Using Stochastic Hill‐Climbing Algorithm
Journal of Flood Risk Management, Volume 19, Issue 4, December 2026.ABSTRACT Flooding is one of the most frequent and devastating natural hazards affecting urban areas globally, leading to considerable social, economic, and environmental impacts. In the present study, a novel framework for flood susceptibility mapping is proposed using the stochastic Hill‐Climbing (SHC) method in the Analytical Hierarchy Process (AHP ...
Akhilesh Poyam +2 more
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