These did not include the Mc Faddin Beach area, but they greatly add to our knowledge of the undersea geology.
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.
The approaching Gulf shoreline in relation to Mc Faddin Beach, at 15,000 B. Some of the latest and most interesting research on sea level history comes from Barbados, on the western edge of the North Atlantic, and it is based on isotopically dated samples of four species of drowned corals, one of which is known to grow at a restricted depth range.
Uranium-thorium dating is used to fix the ages of coral reefs that were killed by postglacial sea level rise.
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.
Survey and backhoe trenching (1982-83) by Coastal Environments, Inc., in advance of this pipeline provided the first formal investigation of the geology immediately inland from the beach, and showed that the artifacts were not coming from this area.
Mc Faddin Beach is a 32-kilometer long stretch of sandy beach in Jefferson County on the upper Texas Gulf coast, extending from High Island on the west to Sea Rim State Park on the east.