and 2004 we expanded our initial geophysical surveys, using both Ground
Penetrating Radar (GPR) and Soil Resistivity.
GPR surveys were
carried out by the Indiana Geological
Survey and the research team.
and flagging the corners of a survey grid.
using the GPR instrument.
Nelson Shaffer operating a GPR system
with Cheryl Munson recording the location of the pass.
of the GPR display screen showing an anomaly.
units can be used across surfaces other than bare or grass-covered lawns,
but we were unable to follow GPR anomalies from the roadside into the
area of the road bed.
like this (generated in 1999) allows the research team to identify
probable features and specific areas of the site that can be
effectively explored to answer research questions.