Geophysical constraints on the evolution of an ephemeral channel at the Sand Creek Massacre National Historic Site, Colorado, USA
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A geophysical survey was conducted on an ephemeral channel, Sand Creek, at Sand Creek Massacre National Historic Site to test three hypothesized migration and depositional models of ephemeral streams. A key motivation for the study is to identify the historical location of Sand Creek, which is critical to establishing the location of the 1864 Sand Creek Massacre. Hammer seismic refraction data were collected on 7 valley-wide lines oriented perpendicular to the channel, and ground penetrating radar data (200 MHz antenna) was collected on a grid overlying the channel and the channel banks. An ...