GEO 101 Chapter Notes - Chapter 18: Andesite, Fault Scarp, Denudation
13 Nov 2017
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Document Summary
Initial landforms are produced directly by volcanic activity, folding and faulting: denudation converts these initial landforms into sequential landforms which are controlled in shape, size and arrangement by the underlying rocks and their structure. Igneous rocks are also resistant: form uplands or mountains rising above adjacent areas of shale and limestone, metamorphic rocks are generally more resistant but vary, marble, schist. Drainage patterns on horizontal strata: drainage pattern (stream pattern) that develops on each landmass type is often related to the underlying rock type and structure. Sedimentary domes: sedimentary dome: distinctive landmass type, a circular or oval structure in which strata have been forced upward into a domed shape, sedimentary domes occur in various places within the covered shield areas of the continents. Erosion forms on fault structures: fault scarp: sharp surface break produced by active normal faulting. Mount shasta in california: advanced stages produce volcanic necks and radial dikes of resistant igneous rock.
