ENVIRSC 1G03 Lecture Notes - Lecture 14: Structural Basin, Syncline, Convergent Boundary
7 Dec 2016
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Document Summary
Shear forces result in shearing: anticline: a fold with the convex side upward. Oldest layers in the middle: syncline: a fold with the concave side upward. Youngest layers in the middle: anticlines and synclines usually alternate in the field. Basin and range topography is often caused by the heating of deep crustal rocks: basin: low area that fills with sediment, range: exposed fault-bounded rocks. Special folds: structural dome = anticlinal circular structure, structural basin = synclinal circular structure. Hamilton is located near the edge of the michigan basin. Brittle response to stress results in faults: * a fracture in bedrock along which rocks on one side have moved relative to the other side; bedding is offset. Where such movement is absent, the fracture is called a joint. Several joints = joint sets: lower pressure and temperatures, compressive forces result in reverse faulting. Hanging wall is the one that gets pushed up (relative to footwall)
