A proglacial origin for the upper Proterozoic Rockfish Conglomerate, central Virginia, U.S.A.

Wehr, F. L.

doi:10.1016/0301-9268(86)90055-0

Cited by 11 publications

(2 citation statements)

References 17 publications

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“…The Rockfish Conglomerate, a geographically restricted unit near the base of the Lynchburg Group in the central Virginia Blue Ridge province (Fig. 1), is interpreted as subaqeuous glacial outwash derived from alpine glaciers that extended into a rift basin (Wehr, 1986). The Rockfish Conglomerate contains coarse-grained rhythmites very similar to rock types exposed at Sharp Top.…”

Section: Significancementioning

confidence: 99%

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Glacially influenced sedimentation in the late Neoproterozoic Mechum River Formation, Blue Ridge province, Virginia

Bailey

Peters

1998

Geol

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The late Neoproterozoic (ca. 700-730 Ma) Mechum River Formation is exposed as a structural inlier within Grenvillian basement in the Blue Ridge province of central Virginia, United States. The southern portion of the Mechum River belt preserves evidence of glaciomarine sedimentation at the margin and basinward of grounding-line fans. Subaqueous glacial till, coarsegrained rhythmites, and dropstones record the incursion of ice into the basin. Marine deposition is evidenced by persistent laminations (cyclopsams) in rhythmically bedded diamictite and possibly by tidally pumped, distal turbidites in laminated mudstones. Glaciomarine sedimentation in the Mechum River Formation may have been coeval with Sturtian-Rapitan glaciations in northwestern Laurentia and Australia, and provides further evidence for a globally cold climate during the late Neoproterozoic

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Section: Significancementioning

confidence: 99%

“…Although Neoproterozoic glacial deposits are common along the western and northeastern margins of Laurentia, rocks of glacial origin have been reported only at a few locations along the Appalachian margin of Laurentia (Blondeau and Lowe, 1972;Schwab, 1976;Wehr, 1986). This study focuses on low-grade metasedimentary rocks of the ca.…”

Section: Introductionmentioning

confidence: 99%