ERSC 1F90 Lecture Notes - Lecture 6: Structural Geology, Reflection Seismology, Graben
9 Apr 2015
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Document Summary
Earth is dynamic: some rocks that contain marine fossils are now above sea level. Structural geologists study the shape and forces responsible for deformation of. Rock structure interpretation has economic significance (esp. precious minerals) Deformation: all changes in the original form and/or size of a rock body. Most crustal deformation occurs on or near plate margins. |puts stationary objects in motion or changes their motion visible responses to stress (eg. shape, size of rock body) Time: a little stress over a long time can cause large changes. When studying a region, a geologist identifies the dominant rock structures: outcrops: where bedrock is exposed at the surface, work is helped with aerial photography, satellite and gis imagery, global. Positioning systems (gps), seismic reflection data and drill holes. Strike: the compass direction of the line produced by the intersection of an inclined rock layer or fault with a horizontal plane; generally expressed as an angle clockwise from north.
