Results 51 to 60 of about 374 (187)

Domed‐rim microbial polygons and their preservation potential

The 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, Timothy I. Eglinton, Negar Haghipour, Simon E. Rouwendaal, Stefano M. Bernasconi, John M. Rivers, Maria Dittrich, Zulfa Al Disi, Kenneth H. Williford, Fadhil Sadooni, Hamad A. Al‐Saad Al‐Kuwari, Tomaso R. R. Bontognali   +11 more
wiley   +1 more source

The regional evolution of a dryland fluvio‐aeolian and lacustrine succession in response to allocyclic forcing: insights from the Early Permian Cutler Group, Utah, USA

Sedimentology, Volume 73, Issue 2, Page 297-354, February 2026.
ABSTRACT Preserved allocyclic signatures in the rock record often reflect basin‐scale climatic variability and serve as key proxies for correlating ancient dryland successions. The notion of climate cyclicity, however, remains largely untested on regionally constrained, outcrop‐calibrated studies.
Oliver Button, Jack G. Connor, Ross P. Pettigrew, Ben A. Kilhams, John A. Howell   +4 more
wiley   +1 more source

Analysis of sand dunes to determine wind direction and detect sand source sites (case study: Khartooran Erg, Iran) [PDF]

Desert, 2007
Wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. Regarding the importance of wind effects on sand dunes especially in Iran, in this study, Khartooran Erg was analyzed to ...
N. Mashhadi, H. Ahmadi, M. Ekhtesasi, S. Feiznia, G. Feghhi   +4 more
doaj   +1 more source

Protracted intercontinental aridification preserved within the early Late Cretaceous strata of the Eastern Gobi Basin, Mongolia

Sedimentology, Volume 73, Issue 1, Page 147-185, January 2026.
ABSTRACT Mongolia's Eastern and Western Gobi Basins preserve a globally significant record of Cretaceous terrestrial vertebrates, yet their biostratigraphic correlations are complicated by a complex geological history. The Eastern Gobi Basin, a northeast‐southwest trending fault‐bounded rift system, includes several minor sub‐basins with distinct ...
Ryan T. Tucker, Michael Ryan King, Puntsag Delgerzaya, William J. Freimuth, Tsogtbaatar Chinzorig, Khishigjav Tsogtbaatar, Ryuji Takasaki, Mototaka Saneyoshi, Alfio Alessandro Chiarenza, Lindsay E. Zanno   +9 more
wiley   +1 more source

Remotely sensed dune celerity and sand flux measurements of the world's fastest barchans (Bodele, Chad)

, 2008
Quantifying sand flux with field measurements is an expensive and time-consuming process. We here present an alternative approach using the COSI-Corr software package for Earth surface deformation detection.
Drake, Nicholas, Vermeesch, P, Drake, N, Vermeesch, Pieter, Drake, N.   +4 more
core   +1 more source

When Barchan Dunes Move Over Craters

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract We investigate the possible outcomes of a subaqueous barchan moving over a crater‐like depression in the bed. For that, we carried out experiments where we varied the dune size, crater and grain diameters, and flow velocities. We found that subaqueous barchans can be blocked, destroyed, or pass over craters, with transitional situations, and ...
P. V. R. Plácido, D. S. Borges, W. R. Assis, E. M. Franklin   +3 more
wiley   +1 more source

Characterizing Subsurface Complexity of Aeolian Morphotypes with Georadar [PDF]

, 2013
Aeolian landforms are classified based on their plan morphology, which is a function of sediment transport volume, wind direction, and vegetation.
Bentley, Andrew Phillip Keller
core   +1 more source

Sand Seas and Dune Fields of Egypt

Geosciences, 2020
The article reviews the state of knowledge about distribution, sizes, dynamics, and ages of all sand seas (N = 6) and dune fields (N = 10) in Egypt (1,001,450 km2). However, chronological data (Optically Stimulated Luminescence, Thermoluminescence), used
Olaf Bubenzer, Nabil S. Embabi, Mahmoud M. Ashour   +2 more
doaj   +1 more source

Transient Hydrology in Amazonis Planitia (Mars) in the Aftermath of the Tooting Impact

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract Hydrological flows generated by meteoroid impact are still largely unexplored on Mars and may also have implications for Earth. We reconstructed the hydrological sequence initiated on Mars by a less than 3 Ma old meteoroid impact that formed the 28 km‐wide Tooting crater on Amazonis Planitia, an ice‐bearing region.
Fabio Vittorio De Blasio, Andrea Caccia, Giovanni Battista Crosta   +2 more
wiley   +1 more source

Groundwater Altered Water Balance and Plant Water Use Efficiency in Desert Ecosystems

Water Resources Research, Volume 61, Issue 11, November 2025.
Abstract Groundwater is an important water source in water‐limited desert ecosystem. Less attention has been paid to how the water balance and plant performance in such ecosystems vary with the presence or absence of groundwater. Appropriate replanting strategies play a pivotal role in preventing desertification.
Yicong Nan, Jianqiang Huo, Gaoling Han, Rui Hu, Yang Zhao, Yafeng Zhang, Xiao Lu, Yuanzhen Zhou, Jannis Groh, Zhishan Zhang   +9 more
wiley   +1 more source