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Full-Text Articles in Physical Sciences and Mathematics
Deciphering Climate From The Characterization Of Ring Width, Carbon, And Oxygen Isotopes In Latewood Tree-Ring Cellulose, Big Thicket National Preserve, Texas, Usa, Daniel Bruce Lewis
Deciphering Climate From The Characterization Of Ring Width, Carbon, And Oxygen Isotopes In Latewood Tree-Ring Cellulose, Big Thicket National Preserve, Texas, Usa, Daniel Bruce Lewis
Doctoral Dissertations
Trees are excellent archives of paleoclimatic information. They can preserve records of past temperature, precipitation, drought, and extreme weather events. The focus of this dissertation is to use tree ring width, carbon isotopes, oxygen isotopes from multiple trees to characterize climate variability and the tree-ring tropical cyclone record. Living longleaf pine trees (Pinus palustris Mill.) were sampled from the Turkey Creek and Big Sandy Creek Units at Big Thicket National Preserve, Texas. Annual tree rings were measured and assigned yearly calendar dates. The latewood portion of each annual ring was shaved with a scalpel, and alpha-cellulose was extracted for …
Assembling The Blue Ridge And Inner Piedmont: Insights Into The Nature And Timing Of Terrane Accretion In The Southern Appalachian Orogen From Geologic Mapping, Stratigraphy, Kinematic Analysis, Petrology, Geochemistry, And Modern Geochronology, Arthur James Merschat
Doctoral Dissertations
Detailed geologic mapping, SHRIMP U-Pb zircon geochronology, geochemistry, petrology, and structural and kinematic analyses were applied to decipher the structure, tectonic heredity, and Paleozoic accretionary history of suspect terranes of the southern Appalachian Blue Ridge (BR) and Inner Piedmont (IP). Detailed geologic mapping in the Waynesville and Sam Knob 7.5-minute quadrangles recognized the Great Balsam Mountains window cored by sillimanite I and II zone Dahlonega gold belt rocks, overthrust by migmatitic biotite gneiss of the Cartoogechaye terrane to the northwest, and migmatitic Tallulah Falls Formation of the Tugaloo terrane to the southeast. Suspect terranes of the BR and IP consist …