Date of Award
Master of Science (MS)
Dennis A. Darby
In southeastern Virginia one to two discontinuous boulder layers occur at the base of the Pleistocene Norfolk Formation. The sediments, heavy minerals and microfossils within the boulder layers in addition to boulder lithologies, dimensions and orientations were studied to determine the origin of these layers. These data indicate the boulder layers were separated into two similar yet distinct layers.
The ancestral James River with sea-level 100 meters lower than today probably had the capacity to entrain 70-80 percent of the clasts in the boulder layers, but probably not the capacity to entrain the larger cobbles and boulders in the boulder layers. Winter river-ice rafting might provide a possible means of transporting the larger and angular clasts from the Blue Ridge and Piedmont Provinces to the boulder layers in southeastern Virginia. Reproduced
McDaniel, Robert C..
"Sedimentologic and Stratigraphic Significance of Boulder Layers in the Outer Coastal Plain of Southeastern Virginia"
(1985). Master of Science (MS), Thesis, Ocean/Earth/Atmos Sciences, Old Dominion University, DOI: 10.25777/tymc-zm82