A5078383610- Paleontology and Stratigraphy of Fossils
- Calcium Carbonate Crystallization and Inhibition
- Geology and Paleoclimatology Research
- Paleontology and Evolutionary Biology
- Geological and Geochemical Analysis
- Marine Biology and Ecology Research
- Geochemistry and Elemental Analysis
- Advanced Materials Characterization Techniques
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Evolution and Paleontology Studies
- Radioactive element chemistry and processing
- Cephalopods and Marine Biology
- Minerals Flotation and Separation Techniques
- Bone Tissue Engineering Materials
- Hydrocarbon exploration and reservoir analysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Diamond and Carbon-based Materials Research
- Marine and environmental studies
- Nuclear materials and radiation effects
- Forensic Anthropology and Bioarchaeology Studies
- Ichthyology and Marine Biology
- Coral and Marine Ecosystems Studies
- Clay minerals and soil interactions
- Geological and Geophysical Studies
University of Alabama
2016-2025
Geological Survey of Alabama
2014-2024
Georgia Southern University
2023
Universitat de València
2018
University of Glasgow
2006-2009
Mahasarakham University
2005-2007
University of Oregon
2004-2005
Our understanding of the evolutionary transitions leading to modern endothermic state birds and mammals is incomplete, partly because tools available study thermophysiology extinct vertebrates are limited. Here we show that clumped isotope analysis eggshells can be used determine body temperatures females during periods ovulation. Late Cretaceous titanosaurid yield similar large endotherms. In contrast, oviraptorid lower than most endotherms but ∼ 6 °C higher co-occurring abiogenic...
Research Article| July 01, 2015 Clumped isotope thermometry in deeply buried sedimentary carbonates: The effects of bond reordering and recrystallization Brock J. Shenton; Shenton † 1Texas A&M University (TAMU), Department Geology & Geophysics, College Station, Texas 77843, USA †brock.shenton@gmail.com. Search for other works by this author on: GSW Google Scholar Ethan L. Grossman; Grossman Benjamin H. Passey; Passey 2Johns Hopkins University, Earth Planetary Sciences, Baltimore, Maryland...
The application of carbonate clumped isotope (Δ47) thermometry in deep-time is often limited by modification the original temperature signal thermal resetting. New modeling approaches to estimate initial isotopic composition partially reset calcites and maximal burial temperatures, however, open promising avenues reconstruction. Such strongly depend on laboratory-derived kinetic parameters calcite materials, which may differ their microstructure, water content distribution, minor trace...
Electron backscatter diffraction (EBSD) is becoming a widely used technique to determine crystallographic orientation in biogenic carbonates. Despite this use, there little information available on preparation for the analysis of EBSD data are compared aragonite and calcite common blue mussel, Mytilus edulis, using different types resin thicknesses carbon coating. Results indicate that carbonate biomineral samples provide better results if they embedded resin, particularly epoxy resin. A...
During and after the Deepwater Horizon Oil Spill (DWHOS), oysters (Crassostrea virginica) were exposed to oil susceptible incidental consumption of surface subsurface materials. We determined contribution materials from DWHOS diet by comparing carbon (C) nitrogen (N) stable isotope ratios in oyster shell suspended particulate matter (SPM) fresh weathered oil. Average δ(13)C δ(15)N values (-21 ± 1‰ 9-11‰, respectively) consistent with naturally available SPM as opposed (-27 0.2‰, 1.6 0.4‰)....
Abstract The thermoregulatory style of Late Cretaceous mosasaurs has become a highly controversial subject in vertebrate palaeontology. These extinct marine reptiles have previously been described as poikilothermic, endothermic or gigantothermic. Here we analyse three genera from the Mooreville Chalk Alabama ( USA ) differing body mass, and compare their δ 18 O PO4 derived temperatures (T b with those coeval poikilothermic fish Enchodus pelagic seabirds Ichthyornis ). Results show that all...
Mineral-producing organisms exert exquisite control on all aspects of biomineral production. Among shell-bearing organisms, a wide range mineral fabrics are developed reflecting diverse modes life that require different material properties. Our knowledge how structures relate to properties is still limited because it requires the determination these detailed scale. Nanoindentation, mostly applied in engineering and materials science, used here assess, at microstructural level, two calcite...
Shark teeth are considered excellent bio-archives because of their high abundance and preservation potential. Chemical proxies recorded by the enameloid layers used to interpret ecological environmental parameters...
<title>Abstract</title> Accurate predictions of the future climate response to CO<sub>2</sub> depend on ability models simulate past analog warmer climates, like Miocene. However, one key unresolved issue in paleoclimate modeling is reproducing pronounced high-latitude warmth and relatively flat latitudinal temperature gradients inferred from proxy records. Here, we use clumped isotope thermometry—a method that sidesteps limitations conventional proxies—on pure coccolith calcite a North...
Marine macroinvertebrates are ideal sentinel organisms to monitor rapid environmental changes associated with climatic phenomena. These build up protective exoskeletons incrementally by biologically-controlled mineralization, which is deeply rooted in long-term evolutionary processes. Recent studies relating potential fluctuations climate change, such as ocean acidification, suggest modifications on carbonate biominerals of marine invertebrates. However, the influence known, and recurrent,...