12. structure and mountains_06

12. structure and mountains_06 - Normal Fault: Footwall...

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OBJECTIVES FOR STRUCTURE 1) Know the definitions of the terms "strike" and "dip' as they are used in structural geology, and know how to read a strike and dip symbol on a geologic map. Strike: North some degrees east or west, line formed by intersection of the planed of the rock bed with a horizontal surface. Dip: The direction in which the steepest angle is formed between the plane of the rock bed and the horizontal surface. 2) Know the three types of stress, the three types of strain, and the features that result. This also requires that you know the types of folds and faults that are possible. Regarding faults, you should know which wall is the foot wall, which the hanging wall, and which direction they move for each fault type. Stress: Force applied over volume of rock ( Compression, tension, shear ) Strain: Deformation of rock in response to stress ( Brittle, ductile, and elastic ) Block on top is hanging wall, Block on bottom is foot wall. Thrust Fault: Low angle ( long distance ) Reverse Fault: The hanging wall goes up
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Unformatted text preview: Normal Fault: Footwall goes up Strike-slip fault: Moves side to side, off-sets stream course Folds: (Syncline Warped down) ( Anticline Warped upward ) Joint: Brittle stress 3) What about geologic structures makes them important to oil exploration? Objectives for Continental Structure and Mountain Building 4) In terms of continental structure, be able to locate/identify/define the following features: Craton (or Shield), Platform, Continental Shelf, and Continental Slope. 5) What is isostacy and how does it operate on the surface of the Earth? 6) Know the three ways mountains can form. 7) What is smoother, the surface of the Earth or a billiard ball? In other words, if a billiard ball were made to the size of the Earth, which one would have taller mountains? 8) What is epeirogenic uplift as opposed to orogenic uplift? 9) What processes can cause a variety of high-relief landforms to be produced from an epeirogenic uplift?...
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12. structure and mountains_06 - Normal Fault: Footwall...

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