Clay - Structural Geology Lab Relationship between Clay...

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Structural Geology Lab Relationship between Clay Analogs of Faults and Folds and the Active Faults and Folds of San Andreas Fault, Salton Trough, and Gulf of California Experimenting with clay analogs can truly expand one’s knowledge of a fault system. As the two fault blocks move past one another, you can see what physically happens to the Earth’s crust as it deforms. The clay cake deformed very similarly to the deformations caused by the San Andreas Fault. As the clay analogs were moved only 5 mm, clay located at the transform faulting zone began to rise. The surface of the clay began to wrinkle and deform. This can also be seen along the transform fault of the San Andreas. Many pictures along the fault show that the crust had risen along the fault boundary and fractured. In drawing 6, en echelon fractures begin to form much like those along the Elkhorn Hills on the San Andreas Fault (Wallace). These en echelon or parallel fractures occur along the transform fault. The fractures at Elkhorn Hills are perpendicular to the fault, yet the fractures in drawing 6 are not quite parallel. If the motion along the fault were allowed to continue, the fractures would become perpendicular.
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Image: U.S. Geological Survey Fig. A: Fractures along the Elkhorn Hills on the San Andreas Fault Landmarks such as roads, rivers, and streams can be displaced by the movement of transform faults, so much that new streams and paleostream beds form. The circle that is located
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This note was uploaded on 07/17/2011 for the course GEOL 4321 taught by Professor Staff during the Spring '11 term at Texas Tech.

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Clay - Structural Geology Lab Relationship between Clay...

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