Browsing by Author "Hames, Willis"

Now showing items 1-20 of 42

40Ar/39Ar Ages of Feldspar and Muscovite from the Source and Detritus of the French Broad River, North Carolina

Fan, Di (2016-08-08)

As the westernmost metamorphic belt of the Appalachians, the Blue Ridge has been the subject of many geochronology studies. The Blue Ridge experienced high-grade deformation and peak metamorphism during Taconic orogeny, ...

40Ar/39Ar Ages of Muscovite from the Western Blue Ridge and Talladega Belt, Georgia and North Carolina

McDonald, Wayne (2008-05-15)

Radiometric age constraints regarding the timing of metamorphism in the western Blue Ridge province of the southern Appalachians have been too limited or uncertain to enable broader correlation and understanding of Taconian, ...

40Ar/39Ar Dating of Detrital Muscovite and Sediment Compositional Analysis of the Pottsville Formation in the Black Warrior basin in Alabama: Implications for Tectonics and Sedimentation

Moore, Mitchell (2012-11-05)

The Greater Black Warrior basin, including the Cahaba and Coosa synclinoria and the Black Warrior basin, contains the thickest preserved accumulation (ca. 2 km) of sediment in the Appalachian-Ouachita foreland. 40Ar/39Ar ...

40Ar/39Ar Diffusion and Age Constraints in Muscovite from the Ruby Mountains, Northeastern Nevada

Griffin, Kayla (2018-06-05)

Plutonic rocks exposed in the Basin and Range province are known to have experienced widespread extension and uplift at ca. 16.5 Ma. This extension is broadly coincident with timing of earliest volcanism of the Yellowstone ...

Analysis of a drill core from the central uplift of Flynn Creek impact structure, Tennessee

Adrian, David (2017-04-25)

Flynn Creek impact structure is a small, asymmetric marine impact structure located in north-central Tennessee that formed when a hypervelocity impact occurred in an ancient shallow marine environment, with the target ...

An analysis of sediment provenance for Carboniferous sandstones in the Ouachita-Arkoma Basin based on detrital muscovite 40Ar/39Ar geochronology and sediment composition

Thompson, Jacob (2019-12-04)

The Arkoma-Ouachita Basin of southeast Oklahoma and central Arkansas, part of the vast Appalachian-Ouachita foreland system, evolved from a passive margin deep-water remnant ocean basin (Ouachita) between Laurentia and ...

Close, Closer, and Even Closer: Introduction of the Digital Microscope into Elementary (K5) Enrichment and Art Classrooms

Beardsley, Lucille W. (2008-12-15)

This study examines the effect of introducing digital microscopy into two elementary classrooms: Teacher E’s enrichment classes and Teacher A’s art classes. Data were obtained during 2004 by conducting preliminary interviews, ...

Developing a Genetic Model for Puerto Rico’s Tibes Iron Deposit through Field Observations and Geochemical Analyses

Barefoot, Marisa (2021-12-03)

Understanding the formation of iron deposits is key for locating new resources and upholding our pledge to transition to renewable energy as iron is required to make steel, a critical component of all green energy technologies. ...

Early modification stage dynamics of shallow crater-filling units, Wetumpka impact structure, Alabama

Heider, Erik (2015-05-07)

Wetumpka, Alabama, USA is the site of a Late Cretaceous, marine-target impact crater structure located on the inner Coastal Plain of Alabama. During Late Cretaceous, Wetumpka was located offshore from a barrier-island ...

An Examination of Metamorphic Uranium Occurrences in Coosa County, Alabama

Horwitz, Jessica (2010-07-06)

Coosa County, Alabama, is host to one or more presumably metamorphosed uranium occurrences of unknown size or grade. The exact location, size and mode of emplacement of each uranium occurrence is currently unknown. This ...

Exhumation History of Caledonian Eclogites in Liverpool Land, East Greenland, and Comparisons with Eclogites in Norway

Bowman, Dannena (2008-05-15)

Lithologic information and 40Ar/39Ar cooling dates are reported from a recently discovered high-pressure (HP) Caledonian eclogite terrane in Liverpool Land, East Greenland, its overlying hanging wall block, and an extensional ...

The Formation of Iron Ore at the Keystone Skarn, Puerto Rico

Patrick, Jessica (2023-08-04) ETD File Embargoed

Iron (Fe) is essential to modern life, primarily for its use in steel. Understanding the processes that transport and deposit Fe within the crust is crucial to finding and evaluating Fe deposits for economic potential. The ...

Geochemistry and Mineralogy of Eastern Ag-Rich Epithermal Veins in the Midas District, Nevada, USA

Chitwood, Rue (2012-04-09)

Five Ag-rich epithermal veins were recently discovered in the eastern section of the Midas district in northern Nevada. Initial data collected indicated that these veins had a significantly higher quantity of silver relative ...

Geochronology and Geochemistry of Mid-Miocene Bonanza Low-Sulfidation Epithermal Ores of the Northern Great Basin, USA

Unger, Derick (2008-05-15)

New high precision 40Ar/39Ar geochronology conducted on previously undated deposits (or deposits with older, less precise K/Ar dates only), indicates that low-sulfidation epithermal Au-Ag mineralization in the northern ...

Geology of the 1:24,000 Roanoke East Quadrangle and investigations of the Long Island Creek Gneiss within the southernmost Appalachians, Alabama and Georgia

Harstad, Rylleigh (2017-07-22)

The geology of the 1:24,000 Roanoke East, Alabama, Quadrangle has been determined to be of high mapping priority by the State Geologic Mapping Advisory Committee due to the rapid development along the I-85 corridor west ...

Geology of the 1:24,000 Tallassee, Alabama, Quadrangle, and its Implications for Southern Appalachian Tectonics

White, Thomas (2008-05-15)

The 1:24,000 scale Tallassee, Alabama, Quadrangle, was mapped to characterize lithologies and structures in the southernmost exposures of the southern Appalachians. Four deformation events are recognized. D1 was associated ...

Geology of the Alexander City 7.5’ Quadrangle, Alabama and U-Pb Zircon Dating of the Elkahatchee Quartz Diorite, southernmost Appalachian orogen

Weinmann, Benjamin (2019-04-26)

Geological mapping of the Alexander City Quadrangle in the eastern Blue Ridge of the Southern Appalachian orogen in Alabama reveals newly recognized units and supports multi-phase magmatism within the 880 km2 Elkahatchee ...