A5065145393- Geochemistry and Elemental Analysis
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Groundwater flow and contamination studies
- Radioactive element chemistry and processing
- Geochemistry and Geologic Mapping
- CO2 Sequestration and Geologic Interactions
- Groundwater and Isotope Geochemistry
- Geological formations and processes
- Paleontology and Evolutionary Biology
- High-pressure geophysics and materials
- Radioactive contamination and transfer
- Mine drainage and remediation techniques
- Electrochemical Analysis and Applications
- Fire effects on ecosystems
- Minerals Flotation and Separation Techniques
- Heavy metals in environment
- Evolution and Paleontology Studies
- Aeolian processes and effects
- Clay minerals and soil interactions
- Concrete and Cement Materials Research
- Marine and environmental studies
- Smart Materials for Construction
- Urban Stormwater Management Solutions
Temple University
2011-2024
South Dakota School of Mines and Technology
2005
Princeton University
1972
The kinetics of uraninite dissolution in water may be summarized by the equation: R = (-d(uran)/dt) 10/sup 20/./sup 25/ (SS) (RF)/sup -1/ (10/sup -3.38-10.8 NOC/) (a/sub ..sigma..CO/sub 2//) (D.O.) H/sup +//) exp (-7045/T) day/sup where is rate reaction, SS specific surface area (cm/sup 2/-gm/sup -1/), RF an organic retardation factor, NOC mole fraction nonuranium cations uraninite, D.O. dissolved oxygen content (ppM), 2/ total carbonate, and T absolute temperature. Application these data...
That some value of the f (sub S 2 ) /f O ratio must be exceeded to stabilize sulfide immiscibility in gabbroic magmas is working hypothesis for formation platinum-enriched horizons Bushveld and Stillwater Complexes. Intrinsic measurements from 900 degrees 1,160 C are given eight eastern three western samples representative chromitites within 970 m stratigraphy containing reef. Similarly, -T data five anorthosites one sample chromitite 370 enclosing J-M reef platiniferous horizon.In Bushveld,...
Abstract Grasslands, which provide fundamental ecosystem services in many arid and semiarid regions of the world, are undergoing rapid increases fire activity highly susceptible to postfire‐accelerated soil erosion by wind. A quantitative assessment physical processes that integrates fire‐wind feedbacks is therefore needed relative vegetation change, biogeochemical cycling, air quality, landscape evolution. We investigated applicability a novel tracer technique—the use multiple rare earth...
Research Article| June 01, 2004 Effect of paleosol formation on rare earth element signatures in fossil bone Christine A. Metzger; Metzger 1Department Geology, Temple University, Philadelphia, Pennsylvania 19112, USA Search for other works by this author on: GSW Google Scholar Dennis O. Terry, Jr.; Jr. David E. Grandstaff Geology (2004) 32 (6): 497–500. https://doi.org/10.1130/G20376.1 Article history received: 02 Dec 2003 rev-recd: 19 Feb accepted: 26 first online: Mar 2017 Cite View This...
Other| June 01, 2001 REE Signatures in Vertebrate Fossils from Sewell, NJ: Implications for Location of the K-T Boundary RICHARD M. STARON; STARON 1Department Geology, Temple University, Philadelphia, PA 19122 *Present address: Geo-Environmental Consultants, Inc., 400 Gordon Drive, Building 501, Exton, 19341. Search other works by this author on: GSW Google Scholar BARBARA S. GRANDSTAFF; GRANDSTAFF 2Department Animal Biology, School Veterinary Medicine, University Pennsylvania, 3800 Spruce...
Lateral and vertical variations of f (sub O 2 ) carbon in whole rock , Fe, Cr, Mg, Al separated chromites are employed to elucidate the chemical relationships between Merensky Reef associated structures termed potholes. These distributions utilized develop a model relating origin potholes platiniferous Reef.Potholes large, roughly circular, and/or rarely irregular depressions (up hundreds meters wide tens deep) footwall filled with equivalent material. Pothole adjacent samples studied herein...
One of the most famous fossiliferous Pleistocene sites in Pacific Northwest is Fossil Lake, Oregon. Until recently, fossil collections from area were not stratigraphically controlled, owing to lack a detailed stratigraphic and chronologic framework. Our field studies reveal at least nine exposed thin rhythmic fining‐upward depositional packages, separated by disconformities. Analysis interbedded tephras reveals that Rye Patch Dam (∼646 ka), Dibekulewe (∼610 Tulelake T64 (∼95 Marble Bluff (47...
The Crystal Geyser Dinosaur Quarry contains a large monospecific accumulation of bones from basal therizinosaur, Falcarius utahensis.The quarry is located approximately 16 km south Green River, Utah, at the base early Cretaceous (Barremian) Yellow Cat Member Cedar Mountain Formation.Fossil in occur three units that have distinct taphonomic, lithologic, and geochemical characteristics.Rare earth element compositions fossils suggest each unit were drawn different reservoirs or sources having...
Abstract The Main Fossiliferous Layer (MFL) is a concentration of vertebrate and invertebrate fossils, 20 to 30 cm thick, preserved in sequence glauconitic sand at or near the Cretaceous–Paleogene boundary New Jersey (USA) coastal plain. Several hypotheses have been proposed explain origin age MFL, including: marine transgression formation lag deposits reworked bones shells, condensed section attritional accumulation fossil material, catastrophic collapse Late Cretaceous ecosystems following...
Degree of bioturbation, Thalassinoides isp. morphology, and diameters were compared across the Cretaceous–Paleogene (K–Pg) boundary interval at three localities along New Jersey coastal plain. Within this regionally extensive ichnoassemblage, mean burrow decrease abruptly by 26–29% (n = 1767) base Main Fossiliferous Layer (MFL) or laterally equivalent horizons. The MFL has been previously interpreted as K–Pg based on last occurrence Cretaceous marine reptiles, birds, ammonites, well iridium...