This is a photo from the Spaulding Dam site. The geologic area consists of igneous intrusive rocks. As you can see in the photo the surface of the rocks seems very smooth and shiny. This is an effect of the presence of glaciers thousands of years ago. As glaciers moved on top of the parent rock, they erode the surface, scraping all the weathered material and leaving behind the competent rock. Also, one can notice glacial striations on the rocks. These striations are caused by the friction between the parent rock and big boulders, which are transported by the glaciers. The direction of the striations shows the direction of the movement of glaciers. machine. A man rotated the wheel and a weight was risen. Then the weight was dropped and the wooden pile was pushed into the ground.
Information collected during the field trip in the Sierra Nevada, as part of the "Engineering Geology" course curriculum, instructed by Professor N. Sitar, Department of Civil & Environmental Engineering, University of California at Berkeley.
This photo is from the Auburn Dam construction si...