Graphite Is Identified in a Particular Schist

question 36

Multiple Choice

Graphite is identified in a particular schist.Which one of the following conclusions is justified?

• A)The rock also contains diamonds; both are crystalline forms of the element carbon.
• B)The schist formed from a quartz-rich, sedimentary limestone.
• C)The graphite lubricated shearing movements along a fault, causing a schist to form.
• D)The pre-metamorphic rock was a shale or mudstone containing organic matter.

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