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Browsing by Author "Steltenpohl, Mark G."

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Geochronology and structural geology of the Kjerringøy Peninsula, Nordland, Norway 

Prouty, Jonathan Michael (2014-10-30)
Field mapping, structural and petrographic analysis, ID-TIMS U-Pb geochronology, 40Ar/39Ar thermochronology, and chemical dating of minerals were employed to decipher the geologic history of the Salten area of north-central ...

Geology of the Dadeville Quadrangle and the Tallassee Synform in Characterizing the Dog River Window 

Abrahams, Joel (2014-03-31)
Structural and lithologic observations are reported for southernmost Appalachian shear zones and Blue Ridge and Inner Piedmont metamorphic rocks exposed on the Dadeville 7.5-minute quadrangle map. Brevard fault zone ...

Geology of the Wadley South Quadrangle and geochronology of the Dadeville Complex, southernmost Appalachians of east Alabama 

VanDervoort, Dane S. (2016-08-01)
Geologic mapping results from rocks in the area of the Wadley South Quadrangle are reported to address basic research questions concerning the Paleozoic tectonometamorphic evolution of the southernmost Appalachians. Key ...

Geology, Petrology, and Geochronology of Rocks in the Our Town, Alabama Quadrangle 

Hawkins, John (2013-11-06)
The area of the 1:24,000 Our Town Quadrangle of east central Alabama is underlain principally by generally undifferentiated metasedimentary units, the Emuckfaw and Wedowee Groups, which have been intruded by major southern ...

Provenance and Composition of Impactite Sands; AU Drill Core #09-04, Wetumpka Impact Structure, Alabama 

Rodesney, Steven (2014-04-29)
The Wetumpka impact structure is a Late Cretaceous shallow-marine impact crater about 6 km in diameter located in central Alabama. The target consisted of Upper Cretaceous sediments that were unconformably overlying Piedmont ...

Trace Element and Hf-Nd Isotope Constraints on the Origin of Young Tengchong Volcanic Rocks, SE Tibetan Plateau 

Ma, Mingjia (2014-05-14)
Hafnium and neodymium isotope systematics in mafic volcanic rocks provide useful information about mantle source characteristics and processes. Hf and Nd isotope arrays are useful for identifying the types of subducted ...