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DENIUS [597]
3 years ago
14

____can give clues about the cooling speeds of magmas, the presence of water beneath the surface or even the intensity of past c

ontact metamorphism​
Geography
1 answer:
serious [3.7K]3 years ago
7 0

Answer:

The grain size

Explanation:

The grain size can provide lot of clues for us when it comes to the formation of the rocks, the conditions in which they formed, and even what happened after their initial formation. The reason for this is that the grains vary in size and shape depending on the conditions in which the rocks formed. If the magma/lava cooled of quickly, the grains will be very small, almost unnoticeable, and that is a sign that the cooling appeared on the surface, very close to it, or in the presence of water. On the other hand, if the magma cooled slowly, the grains will be large and well defined, and that is a sign that the magma was cooling off slowly, deep into the crust, where there's higher temperature and pressure.

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Answer:

a. True.

b. False.

c. True.

d. True.

Explanation:

A landform refers to a geomorphic or natural feature of the Earth's surface, which typically makes its terrain. Some examples of landforms on planet earth are mountain, plains, volcanoes, valley, hills and plateau.

Basically, the tectonic plates such as the oceanic and continental lithosphere interact in three (3) ways and these are; divergent, transform and convergent boundaries.

a. Plates shift the continents around as they move, so Earth's surface is constantly changing.

b. False: the contacts between plates are called passive margins. A passive margin is a region where continents have rifted apart and are then separated by a body of water such as an ocean.

c. True: plates may consist of both ocean floor and continental crust, but never just oceanic or continental crust.

d. True: there are 120 major tectonic plates.

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ANSWER ASAP 25 POINTS
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Answer:

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