Geology Scholarly Works: Recent submissions
Now showing items 41-60 of 247
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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 ... -
Savor the Cyrosphere
(Geological Society of America, 2017-03-30)This article provides concise documentation of the ongoing retreat of glaciers, along with the implications that the ice loss presents, as well as suggestions for geoscience educators to better convey this story to both ... -
Variability in Bioavailable 87Sr/86Sr in the North American Midcontinent
(Ubiquity Press, 2017-06-07)Strontium (Sr) isotope tracers are useful for understanding provenance and mobility in biological materials across multiple disciplines. However, the impact of these techniques is highly dependent on the construction of ... -
Predicting the Geothermal Heat Flux in Greenland: A Machine Learning Approach
(American Geophysical Union, 2017-12-26)Geothermal heat flux (GHF) is a crucial boundary condition for making accurate predictions of ice sheet mass loss, yet it is poorly known in Greenland due to inaccessibility of the bedrock. Here we use a machine learning ... -
Shear-wave anisotropy reveals pore fluid pressure–induced seismicity in the U.S. midcontinent
(American Association for the Advancement of Science, 2017-12-13)Seismicity in the U.S. midcontinent has increased by orders of magnitude over the past decade. Spatiotemporal correlations of seismicity to wastewater injection operations have suggested that injection-related pore fluid ... -
Characterizing the Potential for Injection-Induced Fault Reactivation Through Subsurface Structural Mapping and Stress Field Analysis, Wellington Field, Sumner County, Kansas
(American Geophysical Union, 2017-12-13)Kansas, like other parts of the central U.S., has experienced a recent increase in seismicity. Correlation of these events with brine disposal operations suggests pore fluid pressure increases are reactivating preexisting ... -
Subglacial discharge‐driven renewal of tidewater glacier fjords
(American Geophysical Union, 2017-08-24)The classic model of fjord renewal is complicated by tidewater glacier fjords, where submarine melt and subglacial discharge provide substantial buoyancy forcing at depth. Here we use a suite of idealized, high‐resolution ... -
Near-glacier surveying of a subglacial discharge plume: Implications for plume parameterizations
(American Geophysical Union, 2017-06-03)At tidewater glaciers, plume dynamics affect submarine melting, fjord circulation, and the mixing of meltwater. Models often rely on buoyant plume theory to parameterize plumes and submarine melting; however, these ... -
Iceberg properties and distributions in three Greenlandic fjords using satellite imagery
(Cambridge University Press, 2017-05-03)Icebergs calved from tidewater glaciers represent about one third to one half of the freshwater flux from the Greenland ice sheet to the surrounding ocean. Using multiple satellite datasets, we quantify the first fjord-wide ... -
Laser Ablation Inductively Coupled Plasma Mass Spectrometry U-Pb Dating of Detrital and Magmatic Zircons of Glacial Diamictites and Pebbles in Late Ordovician Sediments of the Taurides and Southeast Anatolian Autochthon Belt, Turkey: Indications for Their Arabian-Nubian Provenance
(University of Chicago Press, 2017-02-01)Late Ordovician (Hirnantian) glacio-marine deposits in the Central and Eastern Taurides and Southeast Anatolian Autochthon Belt (SAAB) in Turkey are mainly composed of diamictites, subrounded granitic pebbles, and ... -
Making the most out of a hydrological model data set: Sensitivity analyses to open the model black‐box
(American Geophysical Union, 2017-08-21)In this work, we investigate methods for gaining greater insight from hydrological model runs conducted for uncertainty quantification and model differentiation. We frame the sensitivity analysis questions in terms of the ... -
Channel-belt scaling relationship and application to early Miocene source-to-sink systems in the Gulf of Mexico basin
(Geological Society of America, 2017-02-01)In past decades, numerous studies have focused on the alluvial sedimentary record of basin fill. Paleo–drainage basin characteristics, such as drainage area or axial river length, have received little attention, mostly ... -
Detrital-zircon records of Cenomanian, Paleocene, and Oligocene Gulf of Mexico drainage integration and sediment routing: Implications for scales of basin-floor fans
(Geological Society of America, 2017-10-02)This paper uses detrital zircon (DZ) provenance and geochronological data to reconstruct paleodrainage areas and lengths for sediment-routing systems that fed the Cenomanian Tuscaloosa-Woodbine, Paleocene Wilcox, and ... -
Almost a spider: a 305-million-year-old fossil arachnid and spider origins
(The Royal Society, 2016-03-30)Spiders are an important animal group, with a long history. Details of their origins remain limited, with little knowledge of their stem group, and no insights into the sequence of character acquisition during spider ... -
A fossil whip-scorpion (Arachnida: Thelyphonida) from the Upper Carboniferous of the Carnic Alps (Friuli, NE Italy)
(University of Milan, 2016-03)A new and well-preserved fossil whip scorpion (Arachnida: Uropygi: Thelyphonida) is described from the Late Carboniferous of the Carnic Alps, Friuli, Italy. It is referred to Parageralinura marsiglioi n. sp. The new specimen ... -
First eurypterid from Italy: a new species of Adelophthalmus (Chelicerata: Eurypterida) from the Upper Carboniferous of the Carnic Alps (Friuli, NE Italy)
(University of Milan, 2013-07)The first eurypterid known from Italy is described, as Adelophthalmus piussii n. sp. It comes from the Upper Carboniferous of the Carnic Alps (Friuli, NE Italy). Relationships with related species are discussed. Adelophthalmids ... -
Crustaceans from bitumen clast in Carboniferous glacial diamictite extend fossil record of copepods
(Nature Publishing Group, 2010-08-10)Copepod crustaceans are extremely abundant but, because of their small size and fragility, they fossilize poorly. Their fossil record consists of one Cretaceous (c. 115 Ma) parasite and a few Miocene (c. 14 Ma) fossils. ... -
Discussions on the age of Daohugou fauna—evidence from invertebrates
(Elsevier, 2006)Volcanic tuff deposits near Daohugou village, Ningcheng County of Inner Monogolia have yielded many well-preserved fossils. Here we briefly introduce our recent findings of invertebrates from the Daohugou fauna: Mainly ... -
First fossil mesothele spider, from the Carboniferous of France
(Musee Dhistoire Naturelle, 1996)First fossil mesothele spider, from the Carboniferous of France. Eothele montceauensis n. gen., n. sp., is described from two specimens from the Upper Carboniferous (Stephanian) of Montceau-Ies-Mines,France, as the first ... -
Allogenic and Autogenic Signals in the Stratigraphic Record of the Deep-Sea Bengal Fan
(Nature Publishing Group, 2018-05-22)The Himalayan-sourced Ganges-Brahmaputra river system and the deep-sea Bengal Fan represent Earth’s largest sediment-dispersal system. Here we present detrital zircon U-Pb provenance data from Miocene to middle Pleistocene ...