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Which one of the following is consistent with deformation by folding?

Horizontal distance is shortened perpendicular to fold axes.

Which one of the following is true for anticlines but not for synclines?

The deeper strata are buckled upward along the fold axis.

A deeply eroded, structural basin would exhibit ________.

strata oriented in roughly circular, outcrop patterns

A ________ fault has little or no vertical movements of the two blocks.

strike slip

In thrust faulting, ________.

the crust is shortened and thickened

A graben is characterized by ________.

a hanging wall block that has moved down between two normal faults

The mountains and valleys of the Basin and Range Province of the western United States formed in response to ________.

tensional stresses and normal-fault movements

In a normal fault ________.

the hanging wall block above an inclined fault plane moves downward relative to the other block

A reverse fault is one in which ________.

the hanging wall block has moved up relative to the footwall block along an inclined fault

________ are the products of horizontally directed, tensional stresses.

Normal faults

A transform fault is ________.

a strike-slip fault that forms the boundary between tectonic plates

The ________ in California is the boundary between the North American and Pacific plates.

San Andreas strike-slip fault

A thrust fault is best described as ________.

a low-angle, reverse fault

A ________ is a prominent ridge formed by differential erosion of tilted, alternating hard and soft strata.


A horst is ________.

an uplifted block bounded by two normal faults

Which one of the following best describes the geology of the Black Hills region in South Dakota?

an elongate dome cored by Proterozoic igneous and metamorphic rocks

The Michigan geologic map shows older, Paleozoic strata (in roughly circular patterns) surrounding a core area of Pennsylvanian rocks. What is this structure?


Normal and reverse faults are characterized mainly by ________.

dip slip

A syncline is ________.

a fold in which the strata dip toward the axis

The Great Rift Valley of East Africa is characterized by ________.

mainly normal faulting as East Africa begins to fragment

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