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Showing 1 to 5 of 5 for “"Yorktown Formation"”.
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Paleocommunities of the Yorktown Formation (Pliocene) of Virginia
The fossiliferous Yorktown Formation (Pliocene) of Virginia was used as a natural laboratory for testing predictions of ecological and evolutionary theories. Specifically, coordinated stasis and ecological locking models have testable elements that can be analyzed using data from the Yorktown …
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Finite element analyses of pile load tests performed in the Yorktown formation, Newport News, Virginia
… soil sampling and in-situ tests within the Yorktown formation; standard soil laboratory tests for index properties and strength-deformation characteristics of the soil along the pile perimeter and tip, plus interface tests to evaluate soil strength-deformation characteristics along the …
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Fossil preservation and the effects of groundwater leaching on fossils in the Yorktown Formation (Upper Pliocene), Virginia
… was mapped in an outcrop (63 m by 2.1 m) of the Yorktown Formation. A paleostream channel located at one end was incised during the Pleistocene and filled with sediments of the Shirley Formation. The Tabb Formation unconformably overlies the outcrop. Acidic groundwater caused the observed …
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Faunal variation and its potential for sampling bias in the Morgarts Beach Member of the Yorktown Formation (Pliocene)
… from the Pliocene Morgarts Beach Member of the Yorktown Formation, located in Isle of Wight County, southeast Virginia. The principal objectives of this study were to examine potential sampling problems and biases inherent in paleontological research. This has been accomplished by statistically …
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Effects of environmental change on species: Marvacrassatella lineage and the Plio-Pleistocene record of sea level change
… Approximately 800 specimens representing seven formations (Yorktown, Duplin, Raysor, Jackson Bluff, Tamiami, Chowan River, and James City) and three members (Rushmere and Moore House Member of the Yorktown Formation, and the Edenhouse Member of the Chowan River Formation) from the early late …