Exam 9: Crags, cracks, and Crumples: Crustal Deformation and Mountain Building

In a ____________ fault,the fault plane is less than 30° from horizontal and the hanging-wall block moves upward relative to the footwall block.

Movement along faults often produces sharply angled rock fragments termed ____________.

In the above map the vertical,north-south trending fault is a ____________ fault.

The sides of a fold where curvature is at a minimum are termed ____________.

The central portion of high curvature on a fold is termed the fold ____________.

A body of rock to which a sudden,rapid stress has been applied is more likely to exhibit ____________ than is a body of rock subjected to a gradually applied stress.

Earthquakes only occur ____________ the brittle/ductile transition depth.

A fold shaped like an elongate arch is a(n)____________.

A joint always occurs as a single,isolated plane within a rock.

Right-lateral and left-lateral are both examples of ____________ faults.

Normal,reverse,and thrust are all examples of ____________ faults.

Motion along all faults is either strike-slip or dip-slip; combinations of these two types of displacement are never found together in a single fault.

The distinction between joints and faults is that ____________.

An episode of mountain building is termed a(n)____________.

Continental crust is typically 35 km thick,but may be up to ____________ thicker under mountain ranges.

A polished surface produced by rock scraping along a fault is termed a(n)____________.

A fold shaped like a right-side up bowl is a(n)____________.

Regions where Precambrian metamorphic rocks are exposed at the surface are termed ____________.

Change in shape,induced by stress,is termed ____________.

A fold shaped like an elongate trough is a(n)____________.