A5011534309- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Geological formations and processes
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geological and Tectonic Studies in Latin America
- Drilling and Well Engineering
- Hydrocarbon exploration and reservoir analysis
- Reservoir Engineering and Simulation Methods
- Paleontology and Evolutionary Biology
- Geochemistry and Geologic Mapping
- Geological Studies and Exploration
- Geological Modeling and Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Coastal and Marine Dynamics
- Hydrology and Sediment Transport Processes
- Tropical and Extratropical Cyclones Research
- Methane Hydrates and Related Phenomena
- Pacific and Southeast Asian Studies
- Landslides and related hazards
- Marine and fisheries research
- Marine and environmental studies
- Geological Formations and Processes Exploration
- Offshore Engineering and Technologies
- Geochemistry and Elemental Analysis
University of Kansas
2008-2023
United Arab Emirates University
1998
Australian National University
1995
Binghamton University
1973-1991
Bedford Institute of Oceanography
1978
U.S. National Science Foundation
1978
Geological Survey of Canada
1978
University of Delaware
1978
University of Missouri
1978
Shell (Netherlands)
1969
Research Article| December 01, 2006 Timing of recovery from the end-Permian extinction: Geochronologic and biostratigraphic constraints south China Daniel J. Lehrmann; Lehrmann 1Department Geology, University Wisconsin–Oshkosh, Oshkosh, Wisconsin 54901, USA Search for other works by this author on: GSW Google Scholar Jahandar Ramezani; Ramezani 2Department Earth, Atmospheric, Planetary Sciences, Massachusetts Institute Technology, Cambridge, 02139, Samuel A. Bowring; Bowring Mark W. Martin;...
ABSTRACT The Bingham model has been suggested for the rheological behaviour of debris flow. Velocity plotted against yield strength uniquely defines turbulent and laminar flow in published experimental data on materials. These regimes are not defined by a unique value number even though it includes both critical parameters, velocity. Laminar at least final stages natural flows is sediments with parallel‐to‐flow or inclined clast fabric, preservation delicate clasts, blocks projecting from...
ABSTRACT Permeabilities of Holocene carbonate sediments from Florida and the Bahamas, determined for 74 samples by water flow rates in a variable-head permeameter, range 0.6 to 57,000 millidarcies. Porosities 40 78 percent. These parameters are related depositional texture as follows: Table The muddiest (i.e., finest-grained) have highest porosities but lowest permeabilities; this negative correlation between porosity permeability is reverse situation found rocks, even young Pleistocene....
Within a 5-year period two violent tropical storms, Hurricanes Donna and Betsy, passed over the Florida Keys. Although these hurricanes were of comparable size intensity, their geologic effects differed. Both caused extensive damage to outer reefs, although Betsy acted essentially on fauna from which had removed weaker elements. Large-scale movement sand White Bank resulted Hurricane did not occur during Betsy. In Bay, supratidal sedimentation islands mainland was Donna, but virtually absent...
ABSTRACT The Great Bank of Guizhou (GBG) is an exceptionally well exposed isolated Triassic platform in the Nanpanjiang Basin South China. exhumed with its depositional profile preserved and dissected by a faulted syncline that exposes complete uncomplicated cross section providing unique opportunity to evaluate mechanisms involved birth, evolution, demise. GBG formed near southern margin Yangtze Platform during deepening event expanded drowned region surrounding latest Permian. Initial...
Research Article| January 01, 1979 Evolution of Florida Bay from island stratigraphy PAUL ENOS; ENOS 1Department Geological Sciences, State University New York at Binghamton, 13501 Search for other works by this author on: GSW Google Scholar RONALD D. PERKINS 2Department Geology, Duke University, Durham, North Carolina 27708 Author and Article Information Publisher: Society America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print 0016-7606 GSA Bulletin (1979) 90 (1): 59–83....
The Nanpanjiang Basin of south China contains four exceptionally well-exposed, isolated Triassic carbonate platforms. Detailed mapping two-dimensional transects and description stratigraphic sections allow the reconstruction facies architecture, sequence stratigraphy, evolution Biostratigraphy, magnetic-susceptibility profiles, volcanic-ash horizons chronostratigraphic correlation and, thus, a basinwide evaluation mechanisms controlling platform evolution. A comparison architecture...
The late Mesozoic depositional cycle in eastern Mexico began with redbed deposition the Jurassic, included deep- and shallow-water marine carbonates (Late Jurassic to Late Cretaceous), concluded terrigenous detritus from deformation of Sierra Madre Oriental (Eocene). Rudist-fringed, carbonate platforms attained their maximum areal extent facies contrast surrounding basins Albian-Cenomanian. resultant lithofacies are (1) a suite platform carbonates; (2) dark, cherty, pelagic, basinal...
Lower Triassic platforms in the Nanpanjiang Basin contain extensive oolites. Interior oolites are stacked meter-scale cycles arranged into larger coarsening-upward sequences. Oolites thicken toward margins to include grainstones up 50 m (164 ft) thick and giant ooids (up 1 cm [0.4 in.]) composite coated grains. Cross-bedding, ripples, abraded indicate deposition high-energy shoals. Apparent layer-cake correlation across interiors indicates amalgamation of Thinner interior lenses represent...
ABSTRACT Detailed study of a flysch sequence provides information on the variability and spatial relations characteristic sedimentary structures, geometry beds, dynamics depositing currents. Excellent exposures Middle Ordovician Cloridorme Formation in northern Gaspe Peninsula permit correlation individual beds up to 7.5 km well defined units 10.5 direction current flow. Flutes grooves are most abundant directional structures. The orientation is more variable than that flutes vertical...
Abstract The Nanpanjiang Basin occurs in a key position for resolving controversies of basin tectonics and patterns plate assembly at the junction between south China Southeast Asian plates. Paleocurrent measurements indicate that siliciclastic turbidites were sourced by Precambrian Jiangnan uplift to northeast, Yunkai southeast Triassic Songma suture south. Detrital zircon geochronology reveals Archean (2500 Ma), Paleoproterozoic (1800–1900 Neoproterozoic (900–1000 Ma) Paleozoic (420–460...