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The Late Quaternary Evolution Of A Twin Barrier-Island Complex, Cape Charles, Virginia (Stratigraphy, Sedimentology, Wisconsinan, Sea-Level Highstand), Kenneth. Finkelstein
The Late Quaternary Evolution Of A Twin Barrier-Island Complex, Cape Charles, Virginia (Stratigraphy, Sedimentology, Wisconsinan, Sea-Level Highstand), Kenneth. Finkelstein
Dissertations, Theses, and Masters Projects
A total of 68 vibra-cores and 14-box cores in conjunction with high-resolution seismic records are used to describe the late Quaternary development of a twin-barrier island complex. Based on the stratigraphy, radiocarbon dates, and microfossils, a transgressive outer Holocene and inner Pleistocene barrier island complex are recognized. The two subaerial sub-parallel barriers are a result of separate marine transgressions that occurred before and after late Wisconsin glaciation. Pollen assemblages and ten radiocarbon dates from the lagoonal sediments below the older island concur on a date of approximately 30,000 years B.P., hence a probable mid-Wisconsinan age for the overriding barrier island. …
The Sedimentary Processes And Geomorphic History Of Wreck Shoal, An Oyster Reef Of The James River, Virginia, Joseph T. Dealteris
The Sedimentary Processes And Geomorphic History Of Wreck Shoal, An Oyster Reef Of The James River, Virginia, Joseph T. Dealteris
Dissertations, Theses, and Masters Projects
Wreck Shoal is a subtidal oyster reef area located in the James River, Virginia. Two significantly different types of oyster reefs are found in adjacent areas on Wreck Shoal. Hard-rock reefs are characterized by a relatively thick oyster shell layer, higher densities of live oysters, a coarser interstitial sediment, and a negligible sediment cover. In contrast, mud-shell reefs are characterized by a very thin osyter shell layer, considerably lower densities of live oysters, a finer interstitial sediment, and a 1-2 cm layer of very fine sediments covering the reef. The contemporary sedimentation processes operating on the hard-rock and mud-shell oyster …