Browsing Department of Earth and Environmental Sciences by Issue Date
Now showing items 21-40 of 201
-
Experimental Studies On Shrinkage Induced Pressure Measurements Of Four Expansive Soils
(Civil & Environmental Engineering, 2011-03-03)Civil structures were damaged by expansive soils due to its large volumetric changes caused by moisture fluctuations. During wet and dry season, the ground heaves up and also shrinks noticeably. The significant amount of ... -
Chemostratigraphy And Paleoenvironment Of The Smithwick Formation, Fort Worth Basin, San Saba County, Texas
(Geology, 2011-07-14)The Early Pennsylvanian-Age Smithwick Formation was deposited in the tectonically active Fort Worth Basin in North Central Texas during a time of well-documented global climatic instability during the Late Paleozoic ice ... -
Leading The James: The Morphological Changes Of The Missouri River And The Subservient James River
(Geology, 2011-07-14)The James River flows into the Missouri River east of Yankton, SD. The degree to which the morphological changes of the Missouri River had an impact on the course of the James River is debatable. After mapping the Mission ... -
Growth And Toxicity Of Prymnesium parvum In Long-term Cultures At Low Temperature And Salinity
(Environmental & Earth Science, 2011-07-14)There is a paradox reported concerning observations of toxic blooms of Prymnesium parvum in winter in Texas (USA), and its growth performance in the laboratlry. Culture experiments indicate relatively high optimum temperature ... -
Microfacies Analysis Of The Jacksboro Limestone Member (Graham Formation, Virgilian, Pennsylvanian) In Jack County, Texas
(Geology, 2011-07-14)The Jacksboro Limestone is a member of the Graham Formation of the Virgilian (Upper Pennsylvanian) and is exposed only in and around the city of Jacksboro in central Jack County, Texas. The purposes of this investigation ... -
Chemostratigraphy And Paleoceanography Of The Mississippian Barnett Formation, Southern Fort Worth Basin, Texas, USA
(Geology, 2011-10-11)The Mississippian (Visean-Serpukhovian) Barnett Formation is a lithologic unit composed primarily of laminated siliceous mudstone and calcareous siliceous mudstone with significant phosphate and sulfide phases present. The ... -
Correlation Of Sequence Stratigraphic Surfaces Of The Mid-cretaceous Dakota Group From Subsurface To Outcrop Southern Denver Basin, Colorado.
(Geology, 2011-10-11)The D and J sandstone of the Cretaceous Dakota Group are considered as the major oil and gas producing units within in the Denver Basin. The distribution of these units in the Denver Basin is a sub-basin of the Early ... -
Air Emissions From Natural Gas Exploration And Mining In The Barnett Shale Geologic Reservoir
(Environmental & Earth Science, 2011-10-11)This study evaluates air emissions from natural gas mining and production in the Barnett Shale within the Dallas/Fort Worth Metroplex. Due to advances in horizontal drilling and hydraulic fracturing, natural gas production ... -
Thermal Maturity And Porosity Development During Catagensis In The Barnett Shale, Fort Worth Basin, Texas
(Geology, 2012-04-11)Unconventional resource plays are typified by significantly recoverable volumes of thermally mature hydrocarbons (oil, condensate and/or gases) trapped within a low permeability shale formation acting as source, reservoir ... -
Chemostratigraphy Of The Eagle Ford Formation
(Geology, 2012-04-11)The Late Cretaceous Eagle Ford Formation contains the Cenomanian-Turonian Boundary (CTB). It crops out along the Red River and extends southward through the Dallas-Fort Worth Area of Texas, Waco, Austin and west towards ... -
Predicting The Ancient Occurrence Of Evaporites Using Paleoclimate Modelling
(Geology, 2012-04-11)Evaporites are climatic indicators that depend on two main variables: mean annual temperature and mean annual precipitation. This study constructs a model that predicts the localities of ancient evaporites based on paleo- ... -
Climate Reconstruction Using Trace Element And Stable Isotope Signatures Preserved In An Early Late Pleistocene Stalagmite From Buckeye Creek Cave, Appalachian Mountains, Southern West Virginia, Usa
(Geology, 2012-04-11)An early-Late Pleistocene stalagmite was recovered from Buckeye Creek Cave (37°58.57'N, 80°23.98'W), southeastern West Virginia, USA. The growth axis of stalagmite BCC-025 was sampled for δ18O, δ13C, and Sr/Ca of the ... -
Chemostratigraphy And The Paleoceanography Of The Bossier-Haynesville Formation, East Texas Basin, Texas and LA, USA
(Geology, 2012-04-11)The fine-grained, dark, organic, calcareous Haynesville shale (Kimmeridgian), and the overlying carbonate-poor Bossier shale (Tithonian) was deposited during the warmer Jurassic period in the tectonically formed East Texas ... -
The Impact Of Buffer Zone Changes on the Architecture Of The Paleozic Lower Cutler Beds Of Utah
(Environmental & Earth Science, 2012-04-11)The Shafer basin fluvial units, as being part of the Paradox fold and fault belt basin, received sediments from alluvial fans through mixed braided-meandering river systems that eroded the clastic rocks of the Uncompahgre ... -
Bismuth-based Oxide Semiconductors: Mild Synthesis And Practical Applications
(Environmental & Earth Science, 2012-04-11)In this dissertation study, bismuth based oxide semiconductors were prepared using 'mild' synthesis techniques - electrodepostion and solution combustion synthesis. Potential environmental remediation and solar energy ... -
Morphology Of The Lower Missouri River: The Processes Involving Development Of Highly Sinuous Gooseneck Loop Cutoffs Exposed In The Surficial Deposits Of The River Floodplain
(Geology, 2012-04-11)Mapping the surficial deposits of the Missouri River from Sioux City, Iowa to Mondamin, Iowa brought to light a prominent set of landforms exposed in the floodplain and which are also easily visible via aerial photography. ... -
Identifying Possible Hydrologic Recharge Zones In The Sangre de Cristo Aquifer on The Milliken Ranch in Las Vegas, NM
(Geology, 2012-04-11)Groundwater at the periphery of mountain ranges in the desert southwest has its provenance in two possible sources: local or regional flow. This study sought to identify the source of deep groundwater from wells on ranches ... -
Predicting The Geographic Distribution Of Ancient Soils With Special Reference To The Cretaceous
(Environmental & Earth Science, 2012-04-11)Different kinds of soils form in different climatic regimes. Soils closely match climatic conditions. Therefore, they are one of the best indicators of past climates. This study uses the "climate envelope" technique developed ... -
Reducing Lead Bioavalability In Soil By Adding Apatite II
(Environmental & Earth Science, 2012-04-11)This study was an examination of phosphate-induced immobilization of lead (Pb) in soils through addition of apatite II (fish bone material). The sources of Pb minerals in the soils examined in this in situ remediation study ... -
An Atlas Of Cenozoic Climate Zones
(Geology, 2012-07-25)This atlas illustrates global climatic zones in five major turning points of Cenozoic climate history: the K/T, the Paleocene/Eocene Thermal Maximum (PETM), the Eocene/Oligocene Transition (EOT), the Late Miocene (Messinian), ...