A5012887119- Geology and Paleoclimatology Research
- Coal Properties and Utilization
- Coal and Its By-products
- Energy and Environment Impacts
- Hydrocarbon exploration and reservoir analysis
- CO2 Sequestration and Geologic Interactions
- Astro and Planetary Science
- Asphalt Pavement Performance Evaluation
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Global Energy and Sustainability Research
- Heavy metals in environment
- Geological Modeling and Analysis
- Marine Bivalve and Aquaculture Studies
- Infrastructure Maintenance and Monitoring
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Energy Efficiency and Management
- Recycling and utilization of industrial and municipal waste in materials production
- Coal and Coke Industries Research
- Pacific and Southeast Asian Studies
- Cephalopods and Marine Biology
- Smart Grid Energy Management
- Groundwater and Isotope Geochemistry
- Geochemistry and Geologic Mapping
Tetra Tech (Canada)
2024
Vermont Law and Graduate School
2016-2019
United States Geological Survey
2010-2018
Entertainment Industries Council
2015
University of Arizona
2007-2010
Brown University
1997-2003
John Brown University
1998
Durham University
1972
Marine upwelling along coastal Peru can be intense and variable, making radiocarbon dating marine systems complex. Historical proxy records of are few, long-lived species such as corals do not grow in the cold waters. Mollusk shell carbonate, however, record both magnitude local reservoir correction, ΔR, seasonal oscillations ventilation age If large, these would complicate organisms. To examine this possibility, we sampled for δ 13 C, 18 O, 14 C content a set pre-bomb Argopecten purpuratus...
Mollusk shells provide brief (<5 yr per shell) records of past marine conditions, including radiocarbon reservoir age ( R ) and upwelling. We report 21 14 C ages calculations on small (∼2 mg) samples from 2 Mesodesma donacium (surf clam) shells. These were excavated a semi-subterranean house floor stratum dated to 7625 ± 35 BP at site QJ-280, Quebrada Jaguay, southern Peru. The ranges in (and thus the are 530 170 yr; individual aragonite spans 130 60 730 yr. This intrashell variability...
Currently the U.S. Geological Survey (USGS) national assessment of geological carbon dioxide (CO2) storage resource considers porous sandstones, limestones, and dolomites as potential formations. Assessment an additional geologic within unmineable coal seams was deferred because no consensus exists on what constitutes coal. Because may be considered resources in future assessments, however, USGS is researching factors affecting CO2
Research Article| May 01, 2013 Marine radiocarbon reservoir age variation in Donax obesulus shells from northern Peru: Late Holocene evidence for extended El Niño Miguel F. Etayo-Cadavid; Etayo-Cadavid 1Department of Geological Sciences, University Alabama, Tuscaloosa, Alabama 35487, USA *Current address: BP America Inc., Houston, Texas 77079, USA; E-mail: Miguel.Etayo@bp.com. Search other works by this author on: GSW Google Scholar C. Fred T. Andrus; Andrus † †E-mails: fandrus@as.ua.edu;...
Abstract We quantified Δ 14 C, δ 18 O, and 13 C cycles along ontogeny within four bay scallop ( Argopecten purpuratus ) shells collected from Callao Bay, Salaverry, Sechura Peru following the 1907–1908 non-El Niño years 1925–1926 El Niño. generally covary; O vary inversely. Simultaneous decreases in increases are followed by constant gradually decreasing which we interpret as evidence for discrete marine upwelling events warming of initially cold upwelled water. Upwelling changes detectable...
Voyager era stereo images are used to map the geology and topography of Ra Patera (a major active volcanic center possible site sulfur eruptions on Io). The summit reaches only ∼1 km above surrounding plains. Pre‐Voyager‐era lava flows occur slopes 0.1–0.3°, comparable lunar mare. These were emplaced at either low viscosities, high eruption rates, or both. A 600‐km‐long ridged mountain unit (rising ∼8 near Carancho Patera) forms a 60 by 90 wide plateau ∼0.5 50 east Patera. new observed...
This paper will examine three diverse microgrid cases in the US, Canada, and European Union. The explore how microgrids can help build resilient communities, facilitate distributed renewable energy, ultimately lead to a secure energy future. include both urban remote settings compare social, legal, policy lessons learned from these advance for long-term community resilience.
Abstract Changes in marine upwelling can affect the radiocarbon content of seawater and thus reservoir age, R. These variations are preserved mollusk shell carbonate. Shell-based estimates R a variable-upwelling environment be biased by (1) changes molluscan growth rates due to fluctuating environmental conditions (2) time averaging during sampling homogenization days or weeks precipitated We modeled growth, content, two Peruvian mollusks, Argopecten purpuratus (bay scallop) Mesodesma...
Excavations in 1970, 1996, and 1999 at Site QJ-280, Quebrada Jaguay, southern Peru, yielded enough dateable terrestrial plant material to establish an extensive radiocarbon chronology for the site. QJ-280 is one of oldest well-dated fishing sites Americas: it was occupied from terminal Pleistocene mid-Holocene (about 13,000–8,300 calibrated years BP) based on 42 dates, encompassing Jaguay Machas Phases local archaeological sequence. In addition measurements valves two marine surf clam...
"Unconventional reservoirs" for carbon dioxide (CO2) storage—that is, geologic reservoirs in which changes to the rock trap CO2 and therefore contribute storage—including coal, shale, basalt, ultramafic rocks, were focus of a U.S. Geological Survey (USGS) workshop held March 28 29, 2012, at National Conservation Training Center Shepherdstown, West Virginia. The goals determine whether detailed assessment storage capacity unconventional is warranted, if so, build set recommendations that...