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These did not include the Mc Faddin Beach area, but they greatly add to our knowledge of the undersea geology.A 1986 study by Charles Pearson and others from Coastal Environments reconstructs the submergence history of the drowned Sabine River valley south of Mc Faddin Beach.of the Interior), began a detailed study of five of the best-documented collections, the ones with recorded dates and locations for the finds. It seems clear that artifacts and fossils are arriving on the beach from a submerged, offshore source area, perhaps at no great distance or depth in the Gulf.Her study included 880 artifacts, or about a third of the total known from the site at the time. dissertation at American University, her study was published in 1999 by the Minerals Management Service and remains the chief source of information on the site. It is also clear that both the present beach area and the offshore source were actually high and dry parts of the inland coastal zone until relatively recently in geologic history.
But still, a decent fraction were in the developed world, indicating that the problem hasn’t disappeared with current advances.
In 1983, avocational archeologist Paul Tanner of Port Arthur began keeping detailed locational records of artifacts found on the beach, and over time became the chief field researcher for the site.
At about the same time, the Minerals Management Service in the US Department of the Interior became concerned about the possible impact of petroleum exploration and recovery on submerged archeological sites on the continental shelf, and commissioned some studies of the seafloor geology.
She examined sources of toolstone, degree of wear, resharpening, the spatial position of the artifact along the beach, ages of the artifacts based on typology, and functional classes of artifacts. In 2004, David Driver of Moore Archeological Consulting carried out a survey of a proposed wetlands area at Mc Faddin National Wildlife Refuge and excavated five backhoe trenches (1.0-1.7 m deep) on the inland side of the highway, finding no cultural material. This was an interfluvial area between the Trinity River valley to the southwest and the Sabine River valley to the northeast.
Since the 1991 conference, Paul Tanner has continued monitoring the site and has recorded, among other things, several more Clovis points from the beach. During the Pleistocene, or last ice age, so much water was sequestered in major continental ice sheets (like the Laurentide ice sheet in North America) and in alpine ice sheets rimming the earth’s mountain ranges, that global sea level was drastically lowered.