-
Geophysical investigations were conducted at the La Purisima Mission State Historic Park to understand potential impacts due to the proposed development of a new visitor’s center.
Geophysical investigations were conducted at the La Purisima Mission State Historic Park to understand potential impacts due to the proposed development of a new visitor’s center. The portion of La Purisima State Park studied is located near the park entrance, just north of the intersection of Purisima Road and Mission Gate Road, in Lompoc, California. Field surveys using four geophysical techniques were conducted on September 23-25, 1999 and October 27-29, 2000 to search for buried objects and structures associated with historic occupation of the site. Four geophysical techniques were employed at La Purisima: ground penetrating radar (GPR), electromagnetic conductivity (EM),…
-
A Study in GPR Mapping and Concurrent Excavations at Gradina Rat, Brač, Croatia
A GPR program was conducted on a hilltop on the island of Brač, Croatia to assess whether this area was a fort, or a defensive structure, as had been suggested by people for many years. Its location, the sight-lines from the ridgetop, and the surface artifacts all supported this idea perhaps dating from the Bronze Age. The first goal of the project was to collect many profiles around the raised edge of a “basin” on the hilltop, which was hypothesized to have been walls of the fort. Instead, the GPR profiles showed resistant limestone bedrock, and no indication of constructed…
-
Additional Analysis on GPR Mapping of the Hominid Trackway, Laetoli, Tanzania
Previously I wrote a paper on the mapping of the hominid tracks at Laetoli Site S, which connected the trackway from two excavations conducted in 2016. In the search for other tracks in other grids, I mapped other features that are not footprints, but could be confused with them. This short paper is that analysis, which discovered and mapped small channels, which were likely water runoff gullies in the T-7 surface. This is not as important as the tracks themselves, but could be confused with trackways features, and need to be considered in any GPR analysis. Here I have also…
