C. Blaine Cecil (Former Employee)
Science and Products
Filter Total Items: 41
The chemistry of eolian quartz dust and the origin of chert 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...
Authors
C. Blaine Cecil, Bruce Hemingway, Frank T. Dulong
Cyclic changes in Pennsylvanian paleoclimate and effects on floristic dynamics in tropical Pangaea 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...
Authors
William A. DiMichele, C. B. Cecil, I.P. Montanez, H. J. Falcon-Lang
Late Devonian glacigenic and associated facies from the central Appalachian Basin, eastern United States 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...
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema
Evidence for long-term climate change in Upper Devonian strata of the central Appalachians 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...
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 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...
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 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...
Authors
Sandra G. Neuzil, Frank T. Dulong, C. Blaine Cecil, Nick Fedorko, John J. Renton, D.K. Bhumbla
Science and Products
Filter Total Items: 41
The chemistry of eolian quartz dust and the origin of chert 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...
Authors
C. Blaine Cecil, Bruce Hemingway, Frank T. Dulong
Cyclic changes in Pennsylvanian paleoclimate and effects on floristic dynamics in tropical Pangaea 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...
Authors
William A. DiMichele, C. B. Cecil, I.P. Montanez, H. J. Falcon-Lang
Late Devonian glacigenic and associated facies from the central Appalachian Basin, eastern United States 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...
Authors
D. K. Brezinski, C. B. Cecil, V.W. Skema
Evidence for long-term climate change in Upper Devonian strata of the central Appalachians 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...
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 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...
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 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...
Authors
Sandra G. Neuzil, Frank T. Dulong, C. Blaine Cecil, Nick Fedorko, John J. Renton, D.K. Bhumbla