Browsing Department of Geosciences by Title
Now showing items 1-20 of 62
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A hydrologic assessment of water chemistry and aquifer properties in the Middle Trinity Aquifer in Bell and McLennan Counties in Texas.
(2018-05-02)The Middle Trinity Aquifer is part of a freshwater aquifer spanning southern Oklahoma and Central Texas. Increasing demand from population growth has promoted a need to better understand productivity and associated aquifer ... -
Abundance and character of organic matter in cretaceous rocks of Central Texas.
(2010-02-02)One of the basic tenants of organic geochemistry states that significant accumulation of organic matter will not occur in well-oxygenated aqueous environments. Changing abundance of sedimentary organic material, therefore, ... -
Age, genesis, and archaeological geology of the sandy mantle on the Gulf Coastal Plain of Texas.
(, 2013-05-15)Alfisols exhibiting strong textural contrasts between sandy A-E horizons (sandy mantle) and clayey Bt horizons on the Gulf Coastal Plain have invoked debate among pedologists, geologists, and archaeologists about parent ... -
Analysis of calcite-filled faults in carbonate strata, balcones trend near Waco, Texas.
(, 2011-09-14)Five normal faults exposed in the Lehigh Quarry near Waco, Texas, were analyzed. The mechanical stratigraphy of the quarry ranges from relatively strong chalk to marly chalk to chalky marl to relatively weak marl. Higher ... -
Application of direct current resistivity method to environmental and hydrological problems.
(2016-04-13)The direct current resistivity (DCR) method is a well-established geophysical method that is widely used in environmental, civil engineering, and hydrological investigations. DCR has the advantage of producing spatial and ... -
Applied forensic investigation of elevated arsenic levels in the Central Texas Trinity Aquifer system.
(2015-07-22)A recent change in EPA regulation lowered the maximum contaminate limit (MCL) of arsenic in drinking water from 50 to 10 μg/l. Lowering the MCL has put numerous water systems in Texas over the limit. An arsenic “hot spot” ... -
Characterizing the reservoir quality of Marcellus Formation Mudrocks through a comparison of chemostratigraphic character and petrophysical response in north-central Pennsylvania.
(2017-11-02)This study combines robust geochemical data with core descriptions and wireline logs to gain new insight into the paleoceanographic conditions during Marcellus deposition and the resulting quality and distribution of ... -
Charcoal chemistry : developing a proxy for paleofire regimes.
(, 2013-09-16)Wildfires have occurred over geologic time since the evolution of land plants and affect global biogeochemical cycling and ecosystem processes. Charcoal particles in the geological record may contain information on several ... -
Climatic and human influences on Holocene alluvial history and paleoenvironment of the middle Delaware River Valley, USA.
(, 2012-11-29)The potential for future prolonged drought episodes in the Northeastern USA is alarming given that a humid climate currently provides water to +50 million people in the northeast, USA. Hydro-climatic projections are ... -
A comparison of the Cretaceous (Albian) Edwards Limestone bioherms of Central Texas with the Holocene Coral Reefs of Bermuda.
(, 2011-09-14)The Edwards Limestone of Central Texas is comprised of numerous rudist-dominated patch reefs that are collectively referred to as the Central Texas Reef Trend. These bioherms were protected by the Stuart City barrier reefs ... -
Controls on the accumulation of organic matter in the Eagle Ford Group, Central Texas, USA.
(, 2014-01-28)The Upper Cretaceous Eagle Ford Formation is an organic rich marine mudrock which outcrops across central Texas. This study documents the chemostratigraphic character of the Pepper and Eagle Ford Formations in central ... -
Correlation of earthquakes with seismogenic faults along the Northern Arizona Seismic Belt, southwestern margin of the Colorado Plateau.
(, 2011-09-14)The Northern Arizona Seismic Belt (NASB) is one of the most seismically active areas in Arizona, and extends from near Kanab in southernmost Utah to the Mogollon Plateau south of Flagstaff, Arizona. The NASB defines the ... -
Correlation of selected earthquakes with seismogenic faults, central Oklahoma.
(2016-02-29)Hypocenter locations for over 3000 earthquakes of M≥2.0 in central Oklahoma between the years 2014 and 2015 were used to attempt to locate seismogenic faults near the city of Guthrie. Focal mechanisms from 29 earthquakes ... -
The county bias of severe thunderstorm warnings and severe thunderstorm weather reports for the Central Texas region.
(2008-06-09)Severe thunderstorm warnings issued by the National Weather Service and severe thunderstorm weather reports dating from January 1, 1986 to December 31, 2005 were analyzed to find a potential county bias in the issuance of ... -
Depositional and diagenetic controls on reservoir quality and their petrophysical predictors within the Upper Cretaceous (Cenomanian) Doe Creek Member of the Kaskapau Formation at Valhalla Field, Northwest Alberta.
(2009-04-03)Valhalla Field, discovered in 1979 and located in northwest Alberta, produces from the Upper Cretaceous Doe Creek Member of the Kaskapau Formation. Original reserves in place are 44 x 106m3 of oil, of which 10.3 x 106m3 ... -
Detailed paleoclimatic records from late Pennsylvanian polygenetic paleosols : north-central Texas, USA.
(, 2013-09-24)Two Canyon Group (late-Pennsylvanian, Missourian) multistory, polygenetic paleosol intervals in north-central Texas, USA record complex paleoclimatic and paleohydrologic histories. Both paleosol intervals show evidence for ... -
Developing a geospatial model for analysis of a dynamic, heterogeneous aquifer : the Brazos River Alluvium aquifer, Central Texas.
(, 2012-08-08)The Brazos River Alluvium aquifer extends from Bosque County to Fort Bend County and is one of 21 minor aquifers in Texas. In the past, this aquifer has mainly served as a source of irrigation water. However, increasing ... -
Effects of surface heterogeneity on the colloidal stability, protein adsorption and bacterial interaction of nanoparticles.
(2014-01-28)Interfacial processes like aggregation and deposition control the transport and fate of natural and engineering nanoparticles (NPs) in the environment, which are relevant to important environmental processes, applications, ... -
Electrical resistivity imaging for characterizing dynamic hydrologic systems.
(2008-10-01)Electrical resistivity imaging (ERI) is widely used in hydrogeophysical studies for monitoring spatiotemporal variations in hydrologic properties and processes. Its applications to hydrologic settings found in sandy and ... -
Factor influencing headcut migration within a cohesive Texas Black-Land gully.
(2017-12-01)Gully erosion degrades the Black-Land Prairies (BLP) (Texas), affecting agricultural productivity. It is initiated by rill and inter-rill erosive processes and exacerbated by storm frequency and duration. Few studies have ...