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Geology: Recent submissions
Now showing items 181-200 of 480
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Metamorphic and Structural Evolution and Provenance of the Blue Ridge Area, Fremont County, Colorado
(University of Kansas, 2015-12-31)New field studies combined with U-Pb zircon/apatite geochronology, thermodynamic equilibrium modeling, whole-rock/rare earth element geochemistry, heavy mineral comparison, and petrographic analysis yield new insights into ... -
Total-Evidence Dating under the Fossilized Birth–Death Process
(Oxford University Press, 2015-10-22)Bayesian total-evidence dating involves the simultaneous analysis of morphological data from the fossil record and morphological and sequence data from recent organisms, and it accommodates the uncertainty in the placement ... -
The relation of geology to coal stripping in southeastern Kansas
(University of Kansas, 1918) -
FOOT AND HINDLIMB MORPHOLOGY, SOFT TISSUES, AND TRACEMAKING BEHAVIORS OF EARLY CRETACEOUS BIRDS FROM CHINA AND THE REPUBLIC OF KOREA WITH A COMPARISON TO MODERN AVIAN MORPHOLOGY AND BEHAVIOR
(University of Kansas, 2014-05-31)The avifauna of the Early Cretaceous is composed of a unique combination of primitive and derived forms. Primitive birds with long tails are found preserved in the same strata as modern-type ornithurine birds, the primitive, ... -
Integrating ecology and evolution in deep time: using Ecological Niche Modeling to study species' evolutionary responses to climate change from the Pliocene to the present-day biodiversity crisis
(University of Kansas, 2014-05-31)The aim of my dissertation was to elucidate how environmental changes have influenced evolutionary and distributional patterns in the near-shore molluscan fauna of the Atlantic Coastal Plain (southeastern U.S.) over the ... -
Quantifying the Carboxyl Group Density of Microbial Cell Surfaces as a Function of Salinity: Insights Into Microbial Precipitation of Low-Temperature Dolomite
(University of Kansas, 2014-08-31)Recent laboratory experiments have documented microbial mediation of low temperature dolomite precipitation via nucleation on microbial surfaces that have high (>0.06 groups Å0.06 groups Å-2) carboxyl group densities. It ... -
Low-temperature thermochronometric constraints on Cenozoic intraplate deformation in the central Basin and Range
(University of Kansas, 2014-08-31)The current form of the Pacific-North American plate boundary is the result of a complex evolution from a subduction zone to a transform boundary. Changes in the kinematics and dynamics of the plate boundary have predictable ... -
REASSESSING THE BIOGENICITY OF PUTATIVE MICROFOSSILS IN THE 3.5 BILLION YEAR OLD APEX CHERT
(University of Kansas, 2015-08-31)Scientists generally agree that life first arose on Earth over 3.5 Ga years ago, but the search for evidence of ancient life is a complex and difficult task due to the scarcity of relatively unaltered Archean rocks. The ... -
Organic Porosity Distribution: A Function of Aromaticity in Organic-Rich Mudrocks
(University of Kansas, 2015-08-31)Organic-rich mudrocks can have heterogeneous pore networks that affect hydrocarbon saturation and fluid flow. Organic porosity, a term used to describe pores within organic matter, contributes to a substantial proportion ... -
Interpretation of Euhapsine (Castoridae: Palaeocastorinae) Burrowing Behaviors Based on the Functional Anatomy of the Teeth and Skull with a Description of a New Species and Genus
(University of Kansas, 2015-05-31)The systematics and burrowing behaviors of the Oligocene–Miocene palaeocastorine beaver tribe Euhapsini are reviewed. A new species, Euhapsis martini, is described based on material from South Dakota previously attributed ... -
Using Radar and Seismic Methods for the Determination of Ice Column Properties and Basal Conditions at Jakobshavn Isbræ and the NEEM Drill Site
(University of Kansas, 2015-05-31)The development of preferred crystal orientation fabrics (COF) within the ice column can have a strong influence on the flow behavior of an ice sheet or glacier. Typically, COF information comes from ice cores. Observations ... -
Suppressing Near-surface Reverse Time Migration Artifacts Using a Band-selecting Imaging Condition
(University of Kansas, 2015-05-31)In this paper, I introduce a frequency band-selecting imaging condition for Reverse Time Migration (RTM) of shallow reflection datasets which effectively eliminates artifacts that are problematic on near-surface reflection ... -
Distributed Evaluation of Local Sensitivity Analysis (DELSA), with application to hydrologic models
(American Geophysical Union, 2014-01-17)This paper presents a hybrid local-global sensitivity analysis method termed the Distributed Evaluation of Local Sensitivity Analysis (DELSA), which is used here to identify important and unimportant parameters and evaluate ... -
Multi-Taxa Isotopic Investigation of Paleohydrology In the Lower Cretaceous Cedar Mountain Formation, Eastern Utah, U.S.A.: Deciphering Effects Of the Nevadaplano Plateau On Regional Climate
(2014)We investigate the regional climatic effects of the formation of the “Nevadaplano” plateau during the Sevier Orogeny in an overall warming world. Paleohydrology was reconstructed from 590 individual measurements of phosphate ... -
Petrography and paragenesis of diagenetic mineral phases in cherty and dolomitic spiculite strata, Mississippian, South-central Kansas
(University of Kansas, 2015-05-31)Mississippian strata in four cores from three different locations in southcentral Kansas (Rhodes field, Wellington field, and a "wildcat" well in Comanche county) were used to investigate the depositional environment, and ... -
Geology of the Lawrence area
(University of Kansas, 1921) -
Seismic attribute analysis of the Upper Morrow Sandstone and the Arbuckle Group from 3D-3C seismic data at Cutter Field, southwest Kansas
(University of Kansas, 2015-05-31)Arbuckle Group and Upper Morrow Sandstone reservoirs have pronounced economic and environmental importance to the state of Kansas because of their history of oil production and potential for CO2 storage. Characterizing and ... -
High resolution seismic reflection to characterize small scale mechanisms of large scale natural dissolution in the Hutchinson Salt Member
(University of Kansas, 2015-05-31)High resolution seismic reflection imaging of the local scale processes along the eastern natural dissolution front of the Hutchinson Salt Member were correlated with its regional scale progression to define a more complete ... -
Pre-stack Seismic Attribute Analysis of the Mississippian Chert and the Arbuckle Group at the Wellington Field, South-central Kansas
(University of Kansas, 2015-05-31)At the Wellington Field, south-central Kansas, the Mississippian reservoir is a microporous cherty dolomite, and the deeper Cambrian-Ordovician Arbuckle Group is a thick succession of interbedded dolomudstones, pack-grainstones, ... -
Constraining neotectonic deformation of the Colombian sub-Andes
(University of Kansas, 2015-05-31)The eastern foothills of the Eastern Cordillera of the Colombian Andes are actively shortening; however, deformation rates of Quaternary structures remain sparse. Here we present millennia-scale deformation rates of the ...