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Monongahela River

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Development of Allegheny and <b>Monongahela</b> <b>River</b> valleys in the past 1 millio...
Published: 01 February 2019
Figure 15. Development of Allegheny and Monongahela River valleys in the past 1 million years ( Harper, 1997 ).
Series: GSA Field Guide
Published: 01 January 2017
DOI: 10.1130/2017.0046(01)
EISBN: 9780813756462
... and nineteenth centuries. The focus is on downtown Pittsburgh, the low-lying triangle of land where the Monongahela and Allegheny Rivers join to form the Ohio River, and Coal Hill (Mount Washington), the escarpment along the Monongahela River to its south. Topics include the importance of—and concomitant effect...
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Series: GSA Field Guide
Published: 01 January 2017
DOI: 10.1130/2017.0046(02)
EISBN: 9780813756462
... that formed near the Pleistocene ice sheet front. Evidence of Pleistocene periglacial climate in this area includes glacial lake deposits in the Monongahela River valley near Morgantown, West Virginia, and Sphagnum peat bogs, rock cities, and patterned ground in plateau areas surrounding the Upper...
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Journal Article
Published: 01 September 1993
Environmental and Engineering Geoscience (1993) xxx (3): 265–279.
...BRIAN H. GREENE, P. G.; JOHN A. GERLACH, P. E.; ANDREW SCHAFFER, P. E. Abstract Point Marion Lock was designed to replace an existing navigation lock that has been in service on the Monongahela River near the Pennsylvania-West Virginia border for some 67 years. As a result of the close proximity...
Journal Article
Published: 01 October 1932
American Mineralogist (1932) 17 (10): 485–490.
...Byron F. King Abstract The region drained by the Monongahela, Allegheny and Ohio Rivers is underlain almost entirely by sedimentary rocks, and the alluvial sands in the rivers are therefore derived mainly from the weathering and erosion of these rocks. However, the fact that some of the area...
Journal Article
Journal: PALAIOS
Published: 01 May 2017
PALAIOS (2017) 32 (5): 295–320.
...DANIEL I. HEMBREE; JARED J. BOWEN Abstract: The upper Monongahela and lower Dunkard groups of southeastern Ohio include abundant paleosols containing ichnofossils as well as vertebrate, invertebrate, and plant body fossils. These paleosols formed on diverse Late Pennsylvanian to Early Permian...
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Series: GSA Special Papers
Published: 01 January 1974
DOI: 10.1130/SPE148-p47
... The Pennsylvanian rocks of the central Appalachians record a progressive change in paleogeography and paleoenvironment, from extensive sea (Pottsville time), to relatively small bay (Allegheny–lower Conemaugh time), to entirely river-influenced lowsalinity bay-lake (upper Conemaugh–Monongahela...
Journal Article
Journal: GSA Bulletin
Published: 01 January 1907
GSA Bulletin (1907) 18 (1): 29–178.
...JOHN J. STEVENSON Abstract The Monongahela Formation CORRELATION The practically continuous area of Monongahela is confined to the southwest four counties of Pennsylvania, a narrow strip in eastern Ohio, and central West Virginia. Small outlying patches remain east from the Alleghenies...
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0020(03)
EISBN: 9780813756202
... of these two intervals and may represent a stacking of several different episodes of river channel formation ( Donaldson et al., 1985 ). Figure 7. Stratigraphy of the Monongahela Group in western Pennsylvania. This interval is interpreted to have been deposited during a long-term humid period by short...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0020(03)
EISBN: 9780813756202
... of the Monongahela Group, the Appalachian climate returned to humid conditions during glacial periods. However, there is evidence of drier subhu-mid conditions during the intervening interglacial episodes as indicated by the pervasive presence of mudcracked nonmarine limestones. Nested lacustrine cycles within...
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Journal Article
Published: 01 December 2011
Environmental Geosciences (2011) 18 (4): 209–211.
... and interstate stature, the Commission can be looked to as a forum for discussion of contemporary issues that represent environmental and regulatory challenges on both the intrastate and interstate levels. In 2008, elevated levels of total dissolved solids in the Monongahela River caused significant treatment...
FIGURES
Journal Article
Published: 01 February 2019
Environmental and Engineering Geoscience (2019) 25 (1): 27–101.
...Figure 15. Development of Allegheny and Monongahela River valleys in the past 1 million years ( Harper, 1997 ). ...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1985
AAPG Bulletin (1985) 69 (9): 1436.
... on the means can separate stratigraphic units into three categories: (1) Kanawha Formation, which has a mean of 5.04 ppm; (2) New River, Pocahontas, and Monongahela Formations, which have means of 10.1, 10.9, and 12.4 ppm, respectively; and (3) Allegheny Formation, which has a mean of 18.1 ppm. Data from 40...
Series: GSA Special Papers
Published: 01 January 1974
DOI: 10.1130/SPE148-p5
... and facies maps of arbitrarily selected thick units suggest two bodies of rocks, each with distinct orientations and distributions of swamp (organic) and lacustrine-marine (chemical) environments with respect to alluvial (deltaic) deposits. The earlier body, including the Pocahontas, New River, Kanawha...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1949
AAPG Bulletin (1949) 33 (3): 275–302.
..., (3) Lower Barren Measures, (4) Upper Productive Coal Measures, (5) Upper Barren Measures. Subsequently, geographic names were applied to these parts: (1) Pottsville, (2) Allegheny River (or Allegheny), (3) Conemaugh, (4) Monongahela, (5) Dunkard. Boundaries at selected coal beds define the limits...
FIGURES
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2399(10)
..., petrographic, and geochemical (collectively referred to as compositional) characteristics of the principal coal beds of the Late Pennsylvanian Monongahela Group to interpret the types of mires from which these coal beds formed. The Monongahela Group was named for exposures along the Monongahela River...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1934
AAPG Bulletin (1934) 18 (5): 567–602.
... Pennsylvanian beds, indicating the age of the uplift as early Pennsylvanian. In the Arbuckle anticline, pre-Pontotoc (pre-Monongahela) rocks are essentially conformable with all the lower Paleozoic formations, thus indicating the late Pennsylvanian age of that fold. Evidence is also presented to show...
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Journal Article
Published: 01 August 1994
Journal of the Geological Society (1994) 151 (4): 669–680.
... and length to A. protracta above the Benwood Limestone, middle Monongahela Group, of Pennsylvania, and to A. protracta 2700 km further west in central Arizona, with which the Pennsylvania band has been correlated. The ranges of variation within the Oslo, Pennsylvania and Arizona assemblages are closely...
Journal Article
Published: 01 December 2013
Journal of Sedimentary Research (2013) 83 (12): 1114–1129.
...Elizabeth Gierlowski-Kordesch; David B. Finkelstein; Jessie J. Truchan Holland; Kevin D. Kallini A bstract : The genesis of thick accumulations of carbonate lake deposits on the siliciclastic floodplains of perennial rivers situated below the regional spring line requires (1) a significant source...
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Journal Article
Published: 01 July 2001
Geological Magazine (2001) 138 (4): 455–470.
... is made up of three lithofacies: cross-bedded sandstone, rippled silty sandstone and bioturbated sandy siltstone, which are organized in multistoreyed sandbodies representing deposition in major river channels. The sandy-mud-dominant association is made up of two lithofacies, mottled clayey siltstone...
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