Geology: Recent submissions
Now showing items 21-40 of 479
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Characterizing Petrophysical Properties of Carbonate Rocks Using Nuclear Magnetic Resonance and Complex Conductivity
(University of Kansas, 2019-12-31)Carbonate rocks are well known for their highly complex petrophysical behaviors due to their intrinsically heterogeneous pore geometry and wide range of pore sizes. As a result, both effective characterization of carbonate ... -
Stable Isotope Geochemistry and Paleohydrology of the Poison Strip Sandstone, Early Cretaceous, Eastern Utah
(University of Kansas, 2019-12-31)The Poison Strip Sandstone Member is a unique unit in the early Cretaceous Cedar Mountain Formation of eastern Utah. A previous chemostratigraphic study of the Poison Strip Sandstone at the Ruby Ranch Road (RRR) section ... -
Evaluation of Seismicity Trends in Kansas to Determine Possible Source Mechanisms Using Focal Mechanism Inversion and Spectral Analysis
(University of Kansas, 2019-12-31)High b-value, proper stress orientation and low stress drop are three factors that support the suggestion that a majority of events in central Kansas are induced as a result of changes in pore pressure. Furthermore, stress ... -
Geochemical Fingerprinting of Yellowstone Hotspot Track (YHT) Eruptions from Ash Beds in the Central United States
(University of Kansas, 2019-12-31)Volcanic ash beds have been shown to be reliable stratigraphic marker beds because they can be radiometrically dated using magmatic minerals: e.g. zircon, sanidine, etc. This can be utilized in any region containing ash ... -
Measuring actinide partitioning in zircon to improve the 230Th correction for 206Pb/238U dates
(University of Kansas, 2019-12-31)The element Th, and its isotope 230Th, an intermediate daughter isotope in the 238U decay series, is often excluded relative to U from the mineral zircon during crystallization. Zircon is geochronologically important because ... -
Permeability Prediction in Rocks Experiencing Mineral Precipitation and Dissolution: A Numerical Study
(American Geophysical Union, 2019-04-01)In this study, we focus on the electrical tortuosity‐based permeability model k = reff2/8F (reff is an effective pore size, and F is the formation factor) and analyze its applicability to rocks experiencing mineral ... -
Collision Chronology Along the İzmir‐Ankara‐Erzincan Suture Zone: Insights From the Sarıcakaya Basin, Western Anatolia
(American Geophysical Union, 2019-09-10)Debate persists concerning the timing and geodynamics of intercontinental collision, style of syncollisional deformation, and development of topography and fold‐and‐thrust belts along the >1,700‐km‐long İzmir‐Ankara‐Erzincan ... -
Variable secondary porosity modeling of carbonate rocks based on μ-CT images
(2019)As an essential carbonate reservoir parameter, porosity is closely related to rock properties. Digital rock physics (DRP) technology can help us to build forward models and find out the relationship between porosity and ... -
The Possible Transition From Glacial Surge to Ice Stream on Vavilov Ice Cap
(Wiley, 2019-11-21)Surge‐type glaciers typically undergo cyclical flow instability due to mass accumulation; however, some recent glacier surges have caused irreversible ice loss in a short period. At Vavilov Ice Cap, Russia, surge‐like ... -
Distinct Frontal Ablation Processes Drive Heterogeneous Submarine Terminus Morphology
(Wiley, 2019-10-10)Calving and submarine melt drive frontal ablation and sculpt the ice face of marine‐terminating glaciers. However, there are sparse observations of submarine termini, which limit estimates of spatially varying submarine ... -
An effaced horseshoe crab (Arthropoda: Chelicerata: Xiphosura) from the Upper Carboniferous of the Carnic Alps (Friuli, NE Italy)
(Università degli Studi di Milano (University of Milan), 2019-07)A carapace of a new horseshoe crab (Arthropoda: Chelicerata: Xiphosura) is described from the Upper Carboniferous (Kasimovian) Meledis Formation of the Carnic Alps, Friuli, Italy. It is named as Stilpnocephalus pontebbanus ... -
Mesophilic microorganisms build terrestrial mats analogous to Precambrian microbial jungles
(Nature Research, 2019-09-20)Development of Archean paleosols and patterns of Precambrian rock weathering suggest colonization of continents by subaerial microbial mats long before evolution of land plants in the Phanerozoic Eon. Modern analogues for ... -
Constraining the geothermal heat flux in Greenland at regions of radar-detected basal water
(Cambridge University Press, 2019-11-04)The spatial distribution of basal water critically impacts the evolution of ice sheets. Current estimates of basal water distribution beneath the Greenland Ice Sheet (GrIS) contain large uncertainties due to poorly constrained ... -
StraboSpot data system for structural geology
(Geological Society of America, 2019-03-05)StraboSpot is a geologic data system that allows researchers to digitally collect, store, and share both field and laboratory data. StraboSpot is based on how geologists actually work to collect field data; although initially ... -
Understanding drivers of antibiotic resistance genes in High Arctic soil ecosystems
(Elsevier, 2019-01-28)Soils in tropical and temperate locations are known to be a sink for the genetic potential of anthropogenic-driven acquired antibiotic resistance (AR). In contrast, accumulation of acquired AR is less probable in most Polar ... -
Significant contribution of small icebergs to the freshwater budget in Greenland fjords
(Nature Research, 2020-10-15)Icebergs represent nearly half of the mass loss from the Greenland Ice Sheet and provide a distributed source of freshwater along fjords which can alter fjord circulation, nutrient levels, and ultimately the Meridional ... -
A seismically induced onshore surge deposit at the KPg boundary, North Dakota
(National Academy of Sciences, 2019-04-01)The most immediate effects of the terminal-Cretaceous Chicxulub impact, essential to understanding the global-scale environmental and biotic collapses that mark the Cretaceous–Paleogene extinction, are poorly resolved ... -
The codell sandstone (upper Cretaceous) of Kansas
(University of Kansas, 1962-05-31) -
Stratigraphy and paleontology of the Eagle Ford formation of north and central Texas
(University of Kansas, 1931-05-31) -
Physiography and geology of south-central Kansas
(University of Kansas, 1934-05-31)