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

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

____________ may help a geologist recognize a fault.

Why do offshore volcanic arcs collide with and suture to an overriding plate?

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

In a ____________ fault,the fault plane is less than 35° from horizontal and the hanging-wall block moves upward relative to the footwall block.

Deformation brought on by orogeny can ____________.

Earthquakes only occur ____________ the brittle/ductile transition depth.

Regions of continents that have not been subjected to orogeny during the past one billion years are termed ____________.

In order to maintain isostasy,what must occur after new igneous rock is added to the crust (either on top of or intruded into)?

Within a platform,sedimentary rocks always have a horizontal orientation.

Nearly all of the present mountain ranges are the products of single orogenic events.

Mt.Everest,the tallest mountain above sea level,is located on the continent of ____________.

Why are blocks of wood floating in water a good analogy for mountains floating on the asthenosphere?

Why might a geologist looking at exposed rock determine that the rock is undeformed?

It is possible for offset along an oblique-slip fault to have both ____________ and ____________ components.

On a geologic map,if the contacts between sedimentary rock units form a series of parallel lines,with the youngest unit in the center,the underlying structure is a(n)____________.

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

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

A geologist's compass differs from the more widely known orienteering compass in that the geologist's compass ____________.

A body of rock affected by tensile stress will likely undergo ____________.