Geology: Recent submissions
Now showing items 41-60 of 479
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Exhumation and incision history of the Torngat Mountains, northern Labrador and Quebec, Canada, using apatite (U-Th)/He thermochronology
(University of Kansas, 2005-05-31)Apatite (U-Th)/He thermochronological data provide new insights into the exhumation history of the Torngat Mountains, which are located in Ungava Peninsula, northern Labrador and Quebec, Canada. Latest Jurassic to earliest ... -
The Cherokee of Southeastern Kansas
(University of Kansas, 1936-05-01)The object of this report is to record the results of a detailed survey of the Cherokee shale. The different members of the Cherokee are described so that they may be recognized and differentiated from each other. Some ... -
Advective Transport: Importance to Groundwater Remediation and Illustration of Basic Transport Concepts to Introductory Audiences
(University of Kansas, 2019-05-31)Developing effective transport models with meaningful results requires a solid understanding of transport concepts and the underlying mechanics the model, and how data can be best integrated into the model. This research ... -
Timing and drivers of exhumation in the hinterland of the North American Cordillera from detrital zircon U-Pb and (U-Th)/He double-dating
(University of Kansas, 2019-12-31)The late Cretaceous to early Cenozoic hinterland of the North American Cordillera is widely recognized as an orogenic plateau. Although most studies suggest that this highland was in place by the Eocene, the timing and ... -
Seismic attribute analysis and CO2 monitoring within the Mississippian reservoir, Wellington field, Sumner County, Kansas
(University of Kansas, 2019-05-31)The Mississippian reservoirs are prolific hydrocarbon producers in the mid-continent of the United States but are challenging to image seismically due to their high heterogeneity and thicknesses typically below seismic ... -
First U-Pb zircon ages for late Miocene Ashfall Konservat-Lagersta¨tte and Grove Lake ashes from eastern Great Plains, USA
(Public Library of Science, 2018-11-08)This paper documents the first U-Pb zircon ages for Ashfall Fossil Beds (Nebraska, USA), a terrestrial Konservat-Lagersta¨ tte mass-death assemblage that is arguably the most diverse of its type and age. The Ashfall ... -
Application of fluvial scaling relationships to reconstruct drainage-basin evolution and sediment routing for the Cretaceous and Paleocene of the Gulf of Mexico
(Geological Society of America, 2018-02-28)Fluvial systems represent a key component in source-to-sink analysis of ancient sediment-dispersal systems. Modern river channels and channel-related deposits possess a range of scaling relationships that reflect drainage-basin ... -
Segmented strain accumulation in the High Himalaya expressed in river channel steepness
(Geological Society of America, 2018-03-12)We investigate segmentation of High Himalayan strain by cross-orogen structures separating western and eastern obliquely convergent sectors from a central orthogonally convergent sector, and evaluate the relationship between ... -
Validation of empirical source-to-sink scaling relationships in a continental-scale system: The Gulf of Mexico basin Cenozoic record
(Geological Society of America, 2018-01-26)Empirical scaling relationships between known deepwater siliciclastic submarine fan systems and their linked drainage basins have previously been established for modern to submodern depositional systems and in a few ancient, ... -
Dating Metasomatism: Monazite and Zircon Growth during Amphibolite Facies Albitization
(MDPI, 2018-04-29)We present coupled textural observations and trace element and geochronological data from metasomatic monazite and zircon, to constrain the timing of high-grade Na-metasomatism (albitization) of an Archean orthogneiss in ... -
Physical Explanation of Archie's Porosity Exponent in Granular Materials: A Process‐Based, Pore‐Scale Numerical Study
(American Geophysical Union, 2018-02-12)The empirical Archie's law has been widely used in geosciences and engineering to explain the measured electrical resistivity of many geological materials, but its physical basis has not been fully understood yet. In this ... -
Joint inversion of NMR and SIP data to estimate pore size distribution of geomaterials
(Oxford University Press, 2017-11-23)There are growing interests in using geophysical tools to characterize the microstructure of geomaterials because of the non-invasive nature and the applicability in field. In these applications, multiple types of ... -
PETROGRAPHY AND ENVIRONMENTAL INTERPRETATION OF TUFA MOUNDS AND CARBONATE BEDS IN THE JURASSIC NAVAJO SANDSTONE OF SOUTHEASTERN UTAH, U.S.A.
(Society for Sedimentary Geology, 2017-09-01)Carbonate deposits in the Jurassic Navajo Sandstone of Utah reflect deposition in interdune lakes and springs. Interdune-lake deposits consist of flat-lying carbonate units. Springs formed tufa mounds that are interpreted ... -
Provenance of Cretaceous through Eocene strata of the Four Corners region: Insights from detrital zircons in the San Juan Basin, New Mexico and Colorado
(Geological Society of America, 2018-02-16)Cretaceous through Eocene strata of the Four Corners region provide an excellent record of changes in sediment provenance from Sevier thin-skinned thrusting through the formation of Laramide block uplifts and intra-foreland ... -
A Data-driven Approach for Mapping Grasslands at a Regional Scale
(University of Kansas, 2019-05-31)The goal of this research was to use a data-driven approach to develop a regional scale grassland mapping protocol with the following objectives. First, identify and characterize the spatial distribution of grassland types ... -
Carboxylated Organic Matter Influences Magnesium Uptake in Three Low-Temperature Dolomite Models
(University of Kansas, 2018-08-31)Numerous geochemical models explain the formation of dolomite at low temperature, a controversial mineral due to its abundance in geological deposits but paucity in modern environments. Several of these models are based ... -
The stratigraphy of the Quaternary alluvium in the Great Bend Prairie, Kansas
(University of Kansas, 1988-05-31)The Quaternary alluvial aquifer beneath the Great Bend Prairie in south-central Kansas serves as a major source of water for irrigation and domestic use. Low quality saline water, however, intrudes locally from Permian and ... -
Rock Fabric Controls on Pore Evolution and Porosity-Permeability Trends in Oolitic Grainstone Reservoirs and Reservoir Analogs
(University of Kansas, 2018-12-31)Although the general influence of rock fabric on porosity and permeability (Φ-k) within carbonates is well documented, if and how pore evolution and Φ-k scatter quantitatively relate to depositional fabric remains poorly ... -
Stratal and Petrophysical Complexity Expressed in Seismic Reflection Patterns within Isolated Carbonate Platforms
(University of Kansas, 2018-12-31)Seismic data are fundamental tools for evaluating and exploiting hydrocarbon resources, yet how the heterogeneous nature of carbonates complicates imaging, interpretation, and predictability of reservoir properties from ... -
Simulating complex conductivity in carbonate rocks: using digital carbonate rocks and comparison to laboratory measurements
(University of Kansas, 2018-12-18)Digital rock physics involves the modern microscopic imaging of geomaterials, digitalization of the microstructure, and numerical simulation of physical properties of rocks. This physics-based approach can give important ...