QUESTION 3 One of the lowest grades of metamorphism, contact metamorphism, occur

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QUESTION 3 One of the lowest grades of metamorphism, contact metamorphism, occurs when rocks are altered when they are buried so deep they are subjected to high temperatures and pressures o hot, watery fluids percolate through rocks and change their chemical composition o an intrusion of magma increases the temperature and pressure of the existing "country'" rock O rocks encounter high pressures causing them to melt QUESTION 4 The principle of original horizontality states that O layers of sediment found on opposite sides of an erosional feature were originally connected o layers of sediment deposited on top of older units are younger than those underneath portions of Earth's crust are recycled due to subduction olayers of sediment are initially horizontal or nearly so when first deposited Click Save and Submit to save and submit. Click Save All Answers to sove all answers.

Explanation / Answer

3) an intrusion of magma increases the temperature and pressure of the existing country rock.

high temperatures is the dominant factor influencing the process,most commonly occuring in the region surrounding the intrusive magma body. as differential stress is insignificant in the formation of rock the texture is typically foliated.

4) layers of sediment are intially horizontal or nearly so when first deposited.

it is deposited horizontally under the action of gravity. the principle is most important analysis of folded and tilted strata.

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