What is the difference between a slip plane in a plastically deforming crystal and a slip plane associated with brittle faulting?
What will be an ideal response?
Answer: A slip plane in the brittle crust is a plane along which there is or has been frictional sliding so that the rock is permanently destroyed. A slip plane in a plastically deforming crystal is much smaller (it occurs within a grain at the atomic scale) and heals continuously without loosing strength. Intercrystalline plastic slip implies movement of a dislocation front within a plane in the crystal, and such a slip plane is usually the plane in a crystal that has the highest density of atoms.
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Devolutionary forces have been strong in
A. Western Europe B. Northern Europe C. Eastern Europe D. Mediterranean Europe
To define the relative age of one geologic feature, one can use geologic principles.
a. true b. false
If the Disconformity is simplified as three steps
(1) Layers of sediment accumulate; (2) Sea level drops and an erosion surface forms; (3) Sea level rises and new sedimentary layers accumulate; then what is the right sequence for these steps? a. (3), (2), (1) b. (1), (2), (3) c. (2), (1), (3) d. (2), (3), (1)
Which of the following terms do geologists use to describe the process whereby rocks are mechanically broken down into smaller pieces?
A. Pulverization weathering B. Disintegration weathering C. Disaggregation weathering D. Physical weathering E. Chemical weathering