Exam 11: Crustal Deformation and Mountain Building

The___________ are a geologically old mountain range folded and deformed during the Paleozoic.

A circular to elliptical structure developed by upward arching of the central strata is a(n)___________.

A region is characterized by numerous anticlines and synclines. There are also several faults present that appear to have formed at the same time as the folding. Without looking at any details, what type of faults would you assume them to be? Why?

A(n)___________fault has little or no vertical movements of the two blocks.

Tensional forces normally cause which one of the following?

A fault is observed in a road cut, but there are no obvious rocks units to correlate on either side of the fault to determine relative movement. How else might you determine or even infer whether the hanging wall has moved up or down relative to the footwall? (Hint: Think of fossils, tectonic setting, etc.)

A(n)___________is a thick accumulation of sediments and small, tectonic blocks formed of material scraped off a descending, lithospheric plate.

A graben is characterized by___________ .

A good example of a present- day, passive continental margin is the___________ .

Fault- block mountains occur in regions dominated by___________ faulting.

Describe the characteristics of regions dominated by fault- block mountains such as the Basin and Range. What is their relationship to plate tectonics and why don't they create large- scale areas of orogenesis like Andean- Type margins or continental collisions?

A circular to elliptical structure developed by downwarping of the central strata is a(n)___________.