C. Blaine Cecil
Blaine Cecil is a Scientist Emeritus with the USGS Geology, Energy & Minerals (GEM) Science Center in Reston, VA.
Science and Products
Filter Total Items: 41
The chemistry of eolian quartz dust and the origin of chert
Among the numerous models that have been suggested for the primary and predominant source of silica for chert, we suggest that eolian dust is worthy of further considerations. Such considerations are supported by the common association of Phanerozoic chert with evaporites, limestones, dolomites, or other strata that were deposited within or near arid paleoclimates. This association suggests a dire
Authors
C. Blaine Cecil, Bruce Hemingway, Frank T. Dulong
Late Devonian glacigenic and associated facies from the central Appalachian Basin, eastern United States
Late Devonian strata in the eastern United States are generally considered as having been deposited under warm tropical conditions. However, a stratigraphically restricted Late Devonian succession of diamictite- mudstonesandstone within the Spechty Kopf and Rockwell Formations that extends for more than 400 km along depositional strike within the central Appalachian Basin may indicate other wise.
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema
Cyclic changes in Pennsylvanian paleoclimate and effects on floristic dynamics in tropical Pangaea
Wetland floras narrowly define perceptions of Pennsylvanian tropical ecosystems, the so-called Coal Age. Such wetlands reflect humid to perhumid climate, leading to characterizations of Pennsylvanian tropics as everwet, swampy. These views are biased by the high preservation potential of wetlands. Sedimentation patterns, paleosols, and fossil floras indicate the presence of vegetation tolerant of
Authors
William A. DiMichele, C. B. Cecil, I.P. Montanez, H. J. Falcon-Lang
Evidence for long-term climate change in Upper Devonian strata of the central Appalachians
The highest 1 to 200 m of the Upper Devonian (Famennian) Catskill and equivalent Hampshire formations exhibit a noticeable vertical or stratigraphic change in color and a shift in lithologic character. The lower part of the unit is characterized by typically red, channel-phase sandstones and overbank siltstone and mudstone containing thin calcareous paleosols. These lithologies give way to greenis
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema, C.A. Kertis
Late Devonian glacial deposits from the eastern United States signal an end of the mid-Paleozoic warm period
A Late Devonian polymictic diamictite extends for more than 400 km from northeastern Pennsylvania across western Maryland and into east-central West Virginia. The matrix-supported, unbedded, locally sheared diamictite contains subangular to rounded clasts up to 2 m in diameter. The mostly rounded clasts are both locally derived and exotic; some exhibit striations, faceting, and polish. The diamict
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema, R. Stamm
Selenium Concentrations in Middle Pennsylvanian Coal-Bearing Strata in the Central Appalachian Basin
Introduction
This report provides the results of a reconnaissance-level investigation of selenium (Se) concentrations in Middle Pennsylvanian coal-bearing strata in the central Appalachian basin. Bryant and others (2002) reported enrichments of Se concentrations in streams draining areas disturbed by surface mining relative to Se concentrations in streams that drain undisturbed areas; the study
Authors
Sandra G. Neuzil, Frank T. Dulong, C. Blaine Cecil, Nick Fedorko, John J. Renton, D.K. Bhumbla
Spatial trends in ash yield, sulfur, selenium, and other selected trace element concentrations in coal beds of the Appalachian Plateau region, U.S.A.
No abstract available.
Authors
Sandra G. Neuzil, Frank T. Dulong, C. Blaine Cecil
Eolian Dust and the Origin of Sedimentary Chert
This paper proposes an alternative model for the primary source of silica contained in bedded sedimentary chert. The proposed model is derived from three principal observations as follows: (1) eolian processes in warm-arid climates produce copious amounts of highly reactive fine-grained quartz particles (dust), (2) eolian processes in warm-arid climates export enormous quantities of quartzose dus
Authors
C. Blaine Cecil
Influence of climate on deep-water clastic sedimentation: application of a modern model, Peru-Chile Trough, to an ancient system, Ouachita Trough
Traditionally, an abrupt and massive influx of siliciclastic sediments into an area of deposition has been attributed to tectonic uplift without consideration of the influence of climate or climatic change on rates of weathering, erosion, transportation, and deposition. With few exceptions, fluvial sediment transport is minimal in both extremely arid climates and in perhumid (everwet) climates. Ma
Authors
N. Terence Edgar, C. Blaine Cecil
A modern analogue for tectonic, eustatic, and climatic processes in cratonic basins: Gulf of Carpentaria, northern Australia
The Gulf of Carpentaria is a tropical, silled epicontinental sea and may be a modern analogue for ancient cratonic basins. For the purpose of this study, the Gulf of Carpentaria is compared to Pennsylvanian cratonic basins of the United States. During the Pennsylvanian, the North American continent moved from the Southern Hemisphere, through the Equator, into the Northern Hemisphere. Today, the Gu
Authors
N. Terence Edgar, C. Blaine Cecil, R. E. Mattick, Patrick de Deckker, Yusuf S. Djajadihardja
Coal Extraction - Environmental Prediction
Coal from the Appalachian region has supplied energy to the Nation for more than 200 years. Appalachian coal fueled America through a civil war and helped win two world wars. Appalachian coal has also provided fuel for keeping America warm in the winter and cool in the summer and has served as the basis for the steel, automobile, organic chemicals, chlorine, and aluminum industries. These benefits
Authors
C. Blaine Cecil, Susan J. Tewalt
Chemical and mineralogical analyses of coal-bearing strata in the Appalachian Basin
No abstract available.
Authors
Frank T. Dulong, Nick Fedorko, John J. Renton, C. Blaine Cecil
Science and Products
Filter Total Items: 41
The chemistry of eolian quartz dust and the origin of chert
Among the numerous models that have been suggested for the primary and predominant source of silica for chert, we suggest that eolian dust is worthy of further considerations. Such considerations are supported by the common association of Phanerozoic chert with evaporites, limestones, dolomites, or other strata that were deposited within or near arid paleoclimates. This association suggests a dire
Authors
C. Blaine Cecil, Bruce Hemingway, Frank T. Dulong
Late Devonian glacigenic and associated facies from the central Appalachian Basin, eastern United States
Late Devonian strata in the eastern United States are generally considered as having been deposited under warm tropical conditions. However, a stratigraphically restricted Late Devonian succession of diamictite- mudstonesandstone within the Spechty Kopf and Rockwell Formations that extends for more than 400 km along depositional strike within the central Appalachian Basin may indicate other wise.
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema
Cyclic changes in Pennsylvanian paleoclimate and effects on floristic dynamics in tropical Pangaea
Wetland floras narrowly define perceptions of Pennsylvanian tropical ecosystems, the so-called Coal Age. Such wetlands reflect humid to perhumid climate, leading to characterizations of Pennsylvanian tropics as everwet, swampy. These views are biased by the high preservation potential of wetlands. Sedimentation patterns, paleosols, and fossil floras indicate the presence of vegetation tolerant of
Authors
William A. DiMichele, C. B. Cecil, I.P. Montanez, H. J. Falcon-Lang
Evidence for long-term climate change in Upper Devonian strata of the central Appalachians
The highest 1 to 200 m of the Upper Devonian (Famennian) Catskill and equivalent Hampshire formations exhibit a noticeable vertical or stratigraphic change in color and a shift in lithologic character. The lower part of the unit is characterized by typically red, channel-phase sandstones and overbank siltstone and mudstone containing thin calcareous paleosols. These lithologies give way to greenis
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema, C.A. Kertis
Late Devonian glacial deposits from the eastern United States signal an end of the mid-Paleozoic warm period
A Late Devonian polymictic diamictite extends for more than 400 km from northeastern Pennsylvania across western Maryland and into east-central West Virginia. The matrix-supported, unbedded, locally sheared diamictite contains subangular to rounded clasts up to 2 m in diameter. The mostly rounded clasts are both locally derived and exotic; some exhibit striations, faceting, and polish. The diamict
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema, R. Stamm
Selenium Concentrations in Middle Pennsylvanian Coal-Bearing Strata in the Central Appalachian Basin
Introduction
This report provides the results of a reconnaissance-level investigation of selenium (Se) concentrations in Middle Pennsylvanian coal-bearing strata in the central Appalachian basin. Bryant and others (2002) reported enrichments of Se concentrations in streams draining areas disturbed by surface mining relative to Se concentrations in streams that drain undisturbed areas; the study
Authors
Sandra G. Neuzil, Frank T. Dulong, C. Blaine Cecil, Nick Fedorko, John J. Renton, D.K. Bhumbla
Spatial trends in ash yield, sulfur, selenium, and other selected trace element concentrations in coal beds of the Appalachian Plateau region, U.S.A.
No abstract available.
Authors
Sandra G. Neuzil, Frank T. Dulong, C. Blaine Cecil
Eolian Dust and the Origin of Sedimentary Chert
This paper proposes an alternative model for the primary source of silica contained in bedded sedimentary chert. The proposed model is derived from three principal observations as follows: (1) eolian processes in warm-arid climates produce copious amounts of highly reactive fine-grained quartz particles (dust), (2) eolian processes in warm-arid climates export enormous quantities of quartzose dus
Authors
C. Blaine Cecil
Influence of climate on deep-water clastic sedimentation: application of a modern model, Peru-Chile Trough, to an ancient system, Ouachita Trough
Traditionally, an abrupt and massive influx of siliciclastic sediments into an area of deposition has been attributed to tectonic uplift without consideration of the influence of climate or climatic change on rates of weathering, erosion, transportation, and deposition. With few exceptions, fluvial sediment transport is minimal in both extremely arid climates and in perhumid (everwet) climates. Ma
Authors
N. Terence Edgar, C. Blaine Cecil
A modern analogue for tectonic, eustatic, and climatic processes in cratonic basins: Gulf of Carpentaria, northern Australia
The Gulf of Carpentaria is a tropical, silled epicontinental sea and may be a modern analogue for ancient cratonic basins. For the purpose of this study, the Gulf of Carpentaria is compared to Pennsylvanian cratonic basins of the United States. During the Pennsylvanian, the North American continent moved from the Southern Hemisphere, through the Equator, into the Northern Hemisphere. Today, the Gu
Authors
N. Terence Edgar, C. Blaine Cecil, R. E. Mattick, Patrick de Deckker, Yusuf S. Djajadihardja
Coal Extraction - Environmental Prediction
Coal from the Appalachian region has supplied energy to the Nation for more than 200 years. Appalachian coal fueled America through a civil war and helped win two world wars. Appalachian coal has also provided fuel for keeping America warm in the winter and cool in the summer and has served as the basis for the steel, automobile, organic chemicals, chlorine, and aluminum industries. These benefits
Authors
C. Blaine Cecil, Susan J. Tewalt
Chemical and mineralogical analyses of coal-bearing strata in the Appalachian Basin
No abstract available.
Authors
Frank T. Dulong, Nick Fedorko, John J. Renton, C. Blaine Cecil