Cyclicity and Facies Characteristics of Alluvial Sediments in the Upper Paleozoic Monongahela-Dunkard Groups, Central West Virginia

Ghosh, Santosh

doi:10.2110/pec.87.39.0229

Cited by 10 publications

(23 citation statements)

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“…Thinner sandstones (FA 2b) indicate the coexistence of smaller, mixed load, meandering channels (Table 3), or small crevasse channels. Vertically stacked multistorey sandstones (FA 2c) imply deposition within a meanderbelt complex during periods of reduced subsidence (Puigdefabregas & Van Vliet, 1978;Galloway, 1981;Ghosh, 1987;Kraus & Middleton, 1987). Alternatively, the apparent lateral continuity of the multistorey sandstones located just above the basal Mill Creek unconformity suggests that they may have been deposited by low-sinuosity fluvial systems (Leckie and Burden, in press).…”

Section: Discussionmentioning

confidence: 99%

“…The upward coarsening and thickening successions overlying small channels are interpreted as a constructive phase of a crevasse lobe advancing into a low-lying part of the floodplain (Farrell, 1987). The thinning and fining-upward successions represent the abandonment phase of a crevasse splay lobe (Ghosh, 1987). At some localities, the advancing phase is followed by the abandonment phase (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Anatomy and evolution of a Lower Cretaceous alluvial plain: sedimentology and palaeosols in the upper Blairmore Group, south‐western Alberta, Canada

1997

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The Lower Cretaceous (Albian) upper Blairmore Group is part of a thick clastic wedge that formed adjacent to the rising Cordillera in south‐western Alberta. Regional transgressive intervals are superimposed on the overall regressive succession. Alluvial conglomerates, sandstones and mudstones were deposited in east‐north‐eastward draining fluvial systems, orientated transverse to the basin axis. Five facies associations have been identified: igneous pebble conglomerate, thick sandstone, interbedded lenticular sandstone and mudstone, thick mudstone with thin sandstone interlayers, and fossiliferous sandstone and mudstone. The facies associations are interpreted as gravelly fluvial channels, sandy fluvial channels, sand‐dominated floodplains, mud‐dominated floodplains, and marine shoreline deposits, respectively. Five types of palaeosols are recognized in the upper Blairmore Group based on lithology, the presence of pedogenic features (clay coatings, root traces, ferruginous nodules, slickensides, carbonate nodules) and degree of horizonization. The regional distribution of the various types of palaeosols enables a refinement of the palaeoenvironmental reconstruction permitting an assessment of the controls on floodplain evolution. In source‐proximal areas, palaeosol development was inhibited by high rates of sedimentation. In source‐distal locations, poor drainage resulting from high watertables, low topography and lower rates of sedimentation also inhibited palaeosol development. The best‐developed palaeosols (containing Bt horizons) occur in intermediate alluvial plain positions (tectonic hinge zone) where the floodplains were most stable due to a balance between sedimentation, erosion and subsidence rates. Extrapolating from the upper Blairmore Group suggests that the tectonic hinge zone of continental foreland basins can be established by palaeosol analysis. At the hinge zone, soil development is controlled primarily by climate and tectonics and their effect on sediment supply, whereas closer to the palaeoshoreline, relative sea level fluctuations, resulting in poor drainage, may have a more significant influence.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Anatomy and evolution of a Lower Cretaceous alluvial plain: sedimentology and palaeosols in the upper Blairmore Group, south‐western Alberta, Canada

1997

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“…Deposits of shallow, ephemeral/marshy carbonate lakes (Ghosh, 1987;AlonsoZarza et al, 1992). basin (Fig.…”

Section: P Bedded Limestonesmentioning

confidence: 99%

Tectonic development of an orogen-top rift recorded by its terrestrial sedimentation pattern: The Neogene Eşen Basin of southwestern Anatolia, Turkey

Alçiçek¹

2007

Sedimentary Geology

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“…Harms et al, 1963). Small laterally-restricted, flat based or channelized bodies are probably crevasse splay deposits that quite often include mud clasts and carbonate nodules resulting from erosion of the levees and nearby pedogenic horizons (Ghosh, 1987). In general, the coarse to medium-grained facies exhibits several fining-upward trends typical of channel and point bar deposits.…”

Section: Channel and Point Bar Depositsmentioning

confidence: 99%

Sedimentation of the Triassic–Jurassic Adigrat Sandstone Formation, Blue Nile (Abay) Basin, Ethiopia

Wolela¹

2008

Journal of African Earth Sciences

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Cyclicity and Facies Characteristics of Alluvial Sediments in the Upper Paleozoic Monongahela-Dunkard Groups, Central West Virginia

Cited by 10 publications

References 0 publications

Anatomy and evolution of a Lower Cretaceous alluvial plain: sedimentology and palaeosols in the upper Blairmore Group, south‐western Alberta, Canada

Anatomy and evolution of a Lower Cretaceous alluvial plain: sedimentology and palaeosols in the upper Blairmore Group, south‐western Alberta, Canada

Tectonic development of an orogen-top rift recorded by its terrestrial sedimentation pattern: The Neogene Eşen Basin of southwestern Anatolia, Turkey

Sedimentation of the Triassic–Jurassic Adigrat Sandstone Formation, Blue Nile (Abay) Basin, Ethiopia

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