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.
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.
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 ________.
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