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Soil gas dynamics and carbon cycling in the vadose zone of a large, regulated river near Austin, Texas
(2020-05-07)
Globally, over half of all rivers are regulated in some way. In some cases, river regulation is the dominant factor governing fluid exchange and soil gas dynamics in the hyporheic and unsaturated zones of the river banks. ...
Ice-free lagoon sediment in areas of continuous Arctic permafrost revealed through electrical resistivity imaging
(2020-09-14)
The Arctic is undergoing profound changes due to amplification of global warming in northern latitudes. One of the key features in the Arctic that remains understudied is ice-bonded subsea permafrost. This coastal feature ...
Seismic-based geomorphology of a mixed carbonate siliciclastic shelf-to-basin submarine drainage system, Miocene, Browse Basin, Northwest Shelf of Australia
(2020-08-14)
Recent studies revealed that carbonate slopes can have similar architectural elements as their siliciclastic counterparts. This study uses a large regional 3D seismic dataset to map and quantify carbonate and mixed ...
Analysis of the depositional systems, lithofacies, diagenesis, and reservoir quality of the lower Cretaceous Pettet Limestone reservoir section of the Wright Mountain field in the East Texas Basin
(2020-12-09)
The Pettet Limestone of the Wright Mountain field on the northeastern flank of the East Texas Basin in Smith County, Texas has been a carbonate hydrocarbon reservoir for nearly 70 years. The Upper Sligo interval (Pettet ...
Geochemical evolution of municipal water in the natural hydrologic system
(2020-12-11)
Austin, Texas is experiencing rapid urban development, posing challenges to the resilience of water resources. Geochemical differences between stream water from relatively pristine rural vs. impacted urban watersheds in ...
A comparison of transpiration rates from three semi-arid tree species in response to partial stand clearing
(2020-08-14)
As precipitation and temperature patterns continue to shift in response to climate change, total water availability including soil and surface waters are likewise altered. In central and west Texas, a common land management ...
Carbonate factory response and recovery after Ocean Anoxic Event 1a, Pearsall Formation, Central Texas
(2020-08-13)
Ocean Anoxic Events (OAEs) are major carbon cycle perturbations that occurred several times in the Mesozoic. OAEs are commonly found to have been caused by a combination of climatic warming and increased surface weathering ...
The Pennsylvanian Lower Strawn Group, Jack and Wise Counties, Fort Worth Basin : facies distribution and stratigraphic architecture
(2020-05-08)
The Lower Strawn Group in Jack and Wise counties of the Fort Worth Basin are laterally and vertically heterogeneous deltaic deposits comprising sandstones, siltstones, and shales with thin, discontinuous carbonates and ...
Patterns of weathering in sedimentary bedrock across a sequence of repeating ridges and valleys
(2020-05-14)
Bedrock weathering plays a fundamental role in liberating nutrients, generating porosity, and producing soil. Compared to the mobile soil layer, little is known about the structure of bedrock weathering profiles across ...
Using tree damage to characterize the evolution of dynamic pressure within the 18 May 1980 pyroclastic density current of Mount St. Helens
(2020-08-17)
On 18 May 1980, Mount St. Helens erupted a laterally directed pyroclastic density current (PDC) that decimated ~600km2 of forest, referred to as the blowdown zone. The head of the current contained the peak dynamic pressure, ...