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ICE Princess25 [194]
3 years ago
6

Shields are:_______.a. composed of rocks that were metamorphosed during recent (less than a million years ago) mountain-building

events. b. composed of some of the oldest rock on the Earth. c. rarely exposed at the Earth's surface and contain blueschist. d. composed of extensive areas of sedimentary layers laid down on lava flows.
Geography
1 answer:
meriva3 years ago
8 0

Answer: Options A, B and D.

Explanation: shields are layers of old rocks that metamorphosed as a result of mountain-building events. Shields also have sedimentary layers that usually rest on the lava of the rock.

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c=49 degrees
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Explanation:
Angle c and the angle that measures 49 degrees are opposite angles. Opposite angles are equal to each other, so we can conclude that angle c is equal to 49 degrees.

c=49 degrees

Angle c and angle b are both sitting on a straight line, and a straight line has an angle measure of 180 degrees. To find angle b, we can subtract 49 from 180.

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Which of the following could become metamorphic rocks?
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<u>Answer: </u>

Neither rock A nor B could become metamorphic rocks.  

<u>Explanation: </u>

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