The data displayed below were collected during a joint project between the following departments at Montana Tech of The University of Montana: Geophysical Engineering and the Montana Bureau of Mines and Geology. The samples represent sandstones collected and analyzed for their potential use as proppant material.

General Information
Reference Loen, J.S., 1990, Lode and placer gold deposits in the Ophir district, Powell, and Lewis Clark Counties, Montana: Colorado State University, Ph.D. dissertation, 264 p.
Measured Section Details