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The ge111b group on top of Bald Mountain: (L to R): Brian Wang, Tim Raub, Brian Savage, Rob Clayton, Auna Moser, Mark Simons, Jeannette Hagan, Rowena Lohman, Javier Favela, Kristen Cook, Joann Stock, Matt Pritchard, Zhimei Yan, and Sarah Cooke . |
Resistivity
| This is a view down the line of stakes in the resistivity experiment on a salt flat near Adobe Valley. In this experiment, a current is put into the ground to measure the resistivity of different subsurface layers. (photo by Rowena Lohman) |  |
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This picture shows the general setting of the resistivity experiment on the salt flat as equipment is being unloaded from the van. |
| Once the resistivity stakes are in the ground the computer automatically collects the data, so Zhimei Yan, Rowena Lohman, Auna Moser and Javier Favela wait for the experiment to be completed. (photo by Rowena Lohman) |  |
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This picture shows a close up of a resistivity stake pounded directly into the Bishop Tuff showing how the stake is connected to the cable. |
Seismics
Javier Favela, Auna Moser, and Kristen Cook bury the Betsy gun for a seismic shot. The purpose of this experiment is to use sound waves (generated by firing of the gun) to image subsurface structures. (photo by Matt Pritchard) |  |
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A cloud of dust is lifted off the ground after a successful seismic shot. One of the Inyo volcanic domes (Obsidian Dome) is in the background. |
Rob Clayton monitors the success of the shot at the center of the Seismics line. (photo by Matt Pritchard) |  |
Ground Penetrating Radar
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Kristen Cook, Joann Stock and Brian Savage set up the Ground Penetrating Radar (GPR) cart to be pulled by the truck. In the background is an outcrop of granite. The purpose of this day's experiment was to use electromagnetic waves to image to contact between the outcrop of granite and the pervasive Bishop Tuff. |
The GPR being pulled behind the truck between Obsidian and Glass Creek volcanic domes. Mark Simons is standing at the cart ensuring that it stays on the road. (photo by Matt Pritchard) |  |
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Brian Savage walks along with the GPR cart as it is pulled behind the truck between Obsidian and Glass Creek volcanic domes. |
Back at Base Camp
| After 6-8 hours of data collection in the field, everyone returned to base camp for preliminary data analysis. (photo by Matt Pritchard) |  |
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Another view of data analysis back at base camp. Each experiment (ground penetrating radar, seismics, magnetics, gravity, and resistivity) had the use of a laptop computer equipped with Matlab, Excel, GIS and other software as well as a printer to aide in their analysis. |
| After the preliminary data analysis, everyone assembled to present their results and hear from the other groups. Here Jeannette Hagan and Brian Wang show the location of the day's experiment on a topo map. (photo by Matt Pritchard) |  |
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At the group meeting, Rowena Lohman shows Bailey's geologic map of the area and how mapped faults and geologic units relate to features seen in the geophysical data. |