Regularly spaced joints in an outcrop may indicate that an area is under intense
ID: 113603 • Letter: R
Question
Regularly spaced joints in an outcrop may indicate that an area
is under intense shear stress.
has experienced compressional stress.
is underlain by a thrust fault.
is formed from rocks that were once at great depth.
Folds are most often associated with _________ stress.
tensional
compressional
shear
straight
What kind of stress results in the lengthening of rock?
compressional
tensional
shear
brittle
A fold shaped like an elongated arch is a(n)
anticline
basin
dome
syncline
The outer portion of a craton, where deformed rocks are covered by sediments, is termed the
shield
cratonic platform
convergent margin
exotic terrane
Metamorphic rocks found in cratons are exposed during orogenesis by
faulting
folding
shields
erosion
Right-lateral and left-lateral are both examples of _________ faults.
strike-slip
dip-slip
oblique-slip
reverse
Which of these properly illustrates the principle of isostasy?
High-density crust floats on top of low-density mantle.
Mountains stand high because they are gravitationally balanced by their deep crustal roots.
When weight is added to the crust, the crust responds by rebounding upward.
When material is removed from the crust, the crust maintains the new, lower elevation.
Mountains forming would be most likely found at the
eastern South American plate boundary.
western South American plate boundary.
eastern South American continental margin.
center of the South American continent.
Continental crust is typically 35 km thick but may be up to __________ thick under mountain ranges.
40 km
70 km
200 km
400 km
is under intense shear stress.
has experienced compressional stress.
is underlain by a thrust fault.
is formed from rocks that were once at great depth.
Explanation / Answer
1. has experienced compressional stress
2.
3. Tensional
4. anticline
5. cratonic platform
6.
7. strike slip
Please ask the remaining questions in the separate questionarrie.