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These new studies suggest that maximum glaciation (and consequently, minimum sea levels) occurred about 26,000 calendar years ago, with sea level about 125 meters lower than at present.This is about 5000 years earlier and five meters deeper than the consensus values that most geologists have customarily used (21,000 calendar years, or 18,000 radiocarbon years for the Last Glacial Maximum, and a 120 m lowering). P., the Gulf shoreline in the upper Texas coast region would have been perhaps 200 km to the southeast of its present position.In the early 1980s, the establishment of the Strategic Petroleum Reserve facility at the Big Hill salt dome (inland from Mc Faddin Beach) led to construction of a brine disposal pipeline across the marsh, the beach, and out into the Gulf.
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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.
It should also be noted that this is just the latest lowering of Gulf sea level during the Pleistocene — there were earlier highstands and lowstands.
By 14,000 years ago, sea level was rising rapidly because of ice sheet melting.
A few of the artifacts have marine organisms (barnacles or bryozoa) attached.
Backhoe testing (in 19) on both sides of Highway 87 has shown that the Pleistocene Beaumont Formation lies less than 2 meters below the ground surface, overlain by sterile Holocene sand and clay representing swamp and marsh deposits. Although artifacts from essentially the entire known span of Texas prehistory are represented, the most striking aspect of this place are the extraordinary numbers of Paleoindian and Early Archaic projectile points that have been discovered here.
Although this public beachfront parcel has been assigned a trinomial archeological site designation (41 JF 50), it is not really an archeological site, but rather a place where artifacts and animal bones have been washing ashore for many years.
Archeologists use the terms to refer to accumulations like this.
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.
In 1991, a conference on the site was organized in Port Arthur by Dee Ann Story, Paul Tanner, and Ellen Sue Turner, and 27 local collections were brought for examination, photography, and preliminary documentation.