Results 201 to 210 of about 279,764 (327)

Sedimentary records of palaeohydrological variability during the Late Holocene in the Lower Narmada Basin, western India

open access: yesThe Depositional Record, Volume 12, Issue 1, February 2026.
Late Holocene palaeohydrological changes in the lower Narmada Basin, India, revealed using multiproxy analyses of the Orsang River terrace sediments. Distinct depositional phases corresponding to global climatic events were recorded. High‐magnitude floods in the Narmada River during the MWP, and within the tributary Orsang River during DACP and LIA ...
Alpa Sridhar   +9 more
wiley   +1 more source

Investigation of formation mechanism of tufa deposits by chemical breakdown of legacy paper mill sludge

open access: yesThe Depositional Record, Volume 12, Issue 1, February 2026.
This study reveals that legacy paper mill sludge can generate tufa deposits through calcium leaching and atmospheric CO2 interaction, acting as a carbon sink. The findings highlight its potential for low‐cost carbon sequestration and sustainable waste management.
Md Jahangir Alam, John M. MacDonald
wiley   +1 more source

Radiocarbon Calibration and Analysis of Stratigraphy: The OxCal Program

open access: yesRadiocarbon: An International Journal of Cosmogenic Isotope Research, 1995
C. Bronk Ramsey
semanticscholar   +1 more source

A critical role of heterotrophic bacteria in early diagenesis of carbonates through exopolymer degradation and calcium release

open access: yesThe Depositional Record, Volume 12, Issue 1, February 2026.
Exopolymeric substances (EPS) produced in the photic zone and surface sediments sequester calcium. Below the sediment surface, heterotrophic bacteria degrade EPS, releasing calcium resulting in carbonate precipitation. This process, which continues for millennia deep in the core, is an important sink for atmospheric carbon dioxide.
Pieter T. Visscher   +9 more
wiley   +1 more source

Microbial mediation and climatic control on dolomite precipitation in a hypersaline lake: Insights from Salinas Lake, southern Iberia

open access: yesThe Depositional Record, Volume 12, Issue 1, February 2026.
The cyclical nature of aridity and humidity led to the alternating deposition of dolomite‐rich and calcite‐rich sediments. During arid phases, the lake hydrology and growth of microbial mats under evaporative and hypersaline environment favors the precipitation of dolomite.
Guolai Li   +6 more
wiley   +1 more source

AMS Radiocarbon Dates from Prehispanic Fortifications in the Huaura Valley, Central Coast of Perú

open access: yesRadiocarbon: An International Journal of Cosmogenic Isotope Research, 2013
Margaret Brown Vega   +4 more
semanticscholar   +1 more source

Domed‐rim microbial polygons and their preservation potential

open access: yesThe Depositional Record, Volume 12, Issue 1, February 2026.
Microbially induced sedimentary structures (MISS) derive through interactions between minerals and microorganisms. We define a domed‐rim MISS, morphologically distinct from abiotic mud cracks and demonstrate its potential for long‐term preservation. These structures represent promising biosignatures in ancient environments on Earth and potentially Mars.
Franziska R. Blattmann   +11 more
wiley   +1 more source

West Central African Peoples: Survey of Radiocarbon Dates over the Past 5000 Years

open access: yesRadiocarbon: An International Journal of Cosmogenic Isotope Research, 2013
R. Oslisly   +5 more
semanticscholar   +1 more source

Palaeoglacier reconstruction and dynamics of Cordillera Vilcanota in the tropical high Peruvian Andes

open access: yesEarth Surface Processes and Landforms, Volume 51, Issue 2, February 2026.
We provide a geomorphological analysis of Cordillera Vilcanota and use morphostratigraphic principles to reconstruct palaeo icefield extent and palaeoglacier readvances, likely during the Antarctic Cold Reversal and Younger Dryas. We find evidence of temperate and polythermal ice margins, with limited glaciofluvial landform generation.
Bethan Davies   +11 more
wiley   +1 more source

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