decreases increases remains constant there is no metamorphism to the west 10 poi
ID: 286447 • Letter: D
Question
decreases
increases
remains constant
there is no metamorphism to the west
10 points
QUESTION 8
Which of the following forms under the highest temperature?
schist
slate
gneiss
phyllite
10 points
QUESTION 9
Shock metamorphism is the result of
tsunami
earthquake
volcanic eruption
meteor impact
10 points
QUESTION 10
Most of Greenland represents
Precambrian shield
continental platform
younger mountains
granite
10 points
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decreases
increases
remains constant
there is no metamorphism to the west
Explanation / Answer
Question 8: Answer: Gneiss.
Gneiss is textural nomenclature of high-grade regional metamorphosed rock. The gneissic texture shows a band of coarser mineral grains in the matrics of finer grain. This foliation is a result of high temperature (>650°) and pressure.
Question 9: Answer: Meteor impact
Shock metamorphism is the low temperature-ultra high-pressure metamorphism which is possible for an exertion of high impact force at a very short time. A meteoric impact can produce shock metamorphism where mineral like coesite (Silica high-pressure polymorph) can be observed in the rock.
Question 10: Answer: Precambrian shield
The geology of Greenland is dominated by crystalline rocks of the Precambrian Shield. The geological development of Greenland can be dated back to 3.8 Ga.
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