Consider the following statements 1 The absolute age of igneous rocks can be obtained from radi...........

Geography Earth Geology

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Consider the following statements.

1. The absolute age of igneous rocks can be obtained from radiometric dating

2. Metamorphism occurs when consolidated rocks undergo recrystallisation within original rocks due to heat and pressure

2 only

1 and 2 only

1 only

None

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Explanation:

Statement 1: Their absolute ages can be obtained from various forms of radiometric dating and thus can be compared to adjacent geological strata, allowing a time sequence of events.

Statement 2: Metamorphism involves the alteration of existing rocks by either excessive heat and pressure, or through the chemical action of fluids. This alteration can cause chemical changes or structural modification to the minerals making up the rock. Structural modification may involve the simple reorganization of minerals into layers or the aggregation of minerals into specific areas within the rock.