Results 41 to 50 of about 409,426 (139)

Sedimentology and geochemistry of the recent sediments of the river system on Hurd Peninsula, Livingston Island, Antarctica

The Depositional Record, Volume 12, Issue 4, September 2026.
This study investigates the sedimentology and geochemistry of recent sediments from ephemeral river systems on Hurd Peninsula, Livingston Island, Antarctica. These systems are important for understanding sedimentary and geochemical processes in unique polar environments.
Yakup Çelik, Merve Özyurt, Raif Kandemir   +2 more
wiley   +1 more source

Beach Gold and Heavy Mineral Concentrates on Tiwai Spit Gravel Strand Plain, Southland, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
The Holocene Tiwai Spit on Foveaux Strait is a 12 km by 2 km gravel‐dominated strand plain, ∼10 m above present sea level. Gravel clasts are dominated by well‐rounded quartz cobbles, pebbles and granules derived from Otago Schist 200 km to the north in evolving river drainage systems during late Cenozoic.
Marshall Palmer, Dave Craw
wiley   +1 more source

Intra‐Tessera Plains: Implications of Their Radar Properties for Surface Processes on Venus

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Intra‐tessera plains are radar‐dark plains deposits that occur within tesserae. Their emplacement mechanism(s) and composition are poorly constrained, though they are hypothesized to be basaltic lava flows. Here, we map intra‐tessera plains within 16 different tesserae spanning various latitudes and elevations.
E. N. Haas, J. L. Whitten
wiley   +1 more source

Depositional History of the Namibian Mud Belt Reveals Late Holocene Weakening of the Benguela Coastal Current

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract We investigate late Holocene changes in the northern Benguela Upwelling System using a multi‐proxy approach on shallow shelf deposits from the Namibian mud belt. Three sediment cores characterized by organic carbon‐rich, anoxic, and partly gas‐bearing sediments were retrieved along a sampling transect at 23°S in August 2019.
Michael Kossack, Chloe H. Anderson, Nikolas Römer‐Stange, Jürgen Titschack, Florian Scholz, Matthias Zabel   +5 more
wiley   +1 more source

Migrating meter-scale bedforms on Martian dark dunes: Are terrestrial aeolian ripples good analogues? [PDF]

, 2017
Using automatic bedform mapping, principal component analysis and clustering we present a multiscale morphodynamic survey of dunes and meter-scale ripples on Herschel crater, Mars.
Vaz, David A., Silvestro, S., Sarmento, Pedro T.K., Cardinale, M., Silvestro, Simone   +4 more
core   +1 more source

Stratigraphic Partitioning of Evaporites Through the Clay‐Sulfate Transition in Gale Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Changing surface conditions on Mars during the Hesperian eon (∼3.6–3.0 billion years ago) produced widespread stratal sequences transitioning from clay to sulfate‐bearing according to orbital data. Using data collected in situ at Gale crater by the Curiosity rover, we examined both the sedimentology and geochemistry of a 210‐m‐thick succession
W. Rapin, G. Dromart, G. Caravaca, J. Schieber, D. Rubin, L. Edgar, S. Gupta, A. Roberts, T. Magnin, B. Clark, L. Kah, R. Sheppard, M. Loche, O. Gasnault, D. Burtt, E. Dehouck, S. Le Mouélic, A. R. Vasavada   +17 more
wiley   +1 more source

Reconstruction of linear dunes from ancient aeolian successions using subsurface data: Permian Auk Formation, Central North Sea, UK [PDF]

, 2018
A series of well logs and cores penetrating the predominantly aeolian Auk Formation, Permian Rotliegend Group, Central North Sea, UK, have been evaluated to determine the morphology and style of migratory behaviour of the original dune bedforms, the ...

core   +1 more source

Process‐Based Modeling of Coastal Dune Blowout Initiation, Development, and Stabilization

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Coastal dune blowouts are key geomorphic features that drive landward sediment transport, dune mobility, and habitat diversity, yet their conditions of formation and evolution remain poorly quantified. Using the process‐based AeoLiS model under time‐invariant wind conditions and for idealized coastal dune settings, we simulate the spontaneous ...
Bruno Castelle, Sierd de Vries, Olivier Burvingt, Alexandre Nicolae Lerma, Patrick Hesp   +4 more
wiley   +1 more source

Surface‐State Controls on Dust Emission Variability in Lower Mesopotamia and Kuwait Using Field and Multi‐High‐Resolution Satellite Data

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Aeolian dust strongly influences climate, air quality, and biogeochemical cycles, yet identifying source areas and determining their surface‐state controls remain challenging. We focus on lower Mesopotamia and Kuwait, a globally significant dust source region where surface characteristics of dust sources remain poorly understood through ...
Jasem A. Albanai, Giles F. S. Wiggs, Ali Al‐Hemoud, David S. G. Thomas   +3 more
wiley   +1 more source

Dune grass production is positively associated with marine nutrient subsidies on US Central Atlantic coast foredunes

Ecosphere, Volume 17, Issue 8, August 2026.
Abstract Resource subsidies, or the flow of energy across ecosystem boundaries, can influence community structure and function and act as important nutrient sources to less productive ecosystems, particularly in marine and coastal zones. Coastal dunes, connected to the nearshore through sandy beaches, likely depend on the delivery of marine subsidies ...
Katya R. Jay, Lucas Parvin, Judith Quintana, Sally D. Hacker   +3 more
wiley   +1 more source