What Are the Two Most Important Sources of Heat for Metamorphism

question 57

Multiple Choice

What are the two most important sources of heat for metamorphism?

• A) intrusive magma bodies and deep burial
• B) intrusive magma bodies and heat from the core
• C) deep burial and volcanism
• D) radioactive decay and volcanism
• E) radioactive decay and deep burial

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Definitions:

Absolute Threshold

The smallest level of a stimulus that can be detected by the senses, such as the lightest touch or quietest sound perceivable.

Absolute Threshold

The smallest level of stimulus that can be detected by a sense (hearing, sight, touch, etc.) at least 50% of the time.

Minimum Threshold

The lowest level at which a stimulus can be detected by the senses.

Difference Threshold

is the minimum difference in stimulation required to differentiate two stimuli, also known as the just noticeable difference.