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metamorphism
define the following terms.
12
Geology
Undergraduate 1
03/04/2008

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Term

Confining pressure

Definition
pressure applied to body equally on all sides, usually as a result of burial.
Term
differential stress
Definition
pressure greature in one direction than the others. usually as a result of plate tectonic forces. Includes shear and compression.
Term
Foliation
Definition
metamorphic rock texture, characterized by aligned mineral grains, to give the appearance of layering.
Term
Geothermal gradient
Definition
The measure of increasing temperature with increasing depth into Earth's subsurface.
Term
What type of plate boundary are most metamorphic rocks formed?
Definition

Convergent

 

plates moving towards each other.

Term
Compressive Stress will cause recrystallizing minerals to grow?
Definition
perpendicular to stress direction.
Term
Shear Stress will cause recrystallizing minerals to grow?
Definition
parallel to stress direction
Term
contact metamorphism derives its heat mainly from what?
Definition
Magma
Term
What two rock characteristics might change during metamorphisim?
Definition
texture and composition
Term
Common use for slate and marble
Definition

Slate:chalkboards,decorative stone,pool tables,roof shingles.

 

marble:countertops,flooring,statues,grave stones.

Term
Which type of metamorphisim results from magma body baking surrounding rock?
Definition
Contact.
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