Tossup

Note to moderator: Read answerline carefully. Description acceptable. Indicators of this property include titanium content and chlorite crystallinity. To study cycles where this property increases, peaks, then decreases, scientists combine data from GBs and GARBs to reconstruct looped P-T-t paths. Points with the same value for this property are joined by isograds. This property increases moving toward the top right in charts on P-T diagrams, such as during the transition from greenschist (-5[1])to granulite facies (-5[1])in the Barrovian series. Index minerals gauge this property, which is low (10[1])in samples formed through a related process’s “burial” and “contact” forms. (10[1]-5[2])This property increases as (10[1])shale (10[1])protolith (-5[1])develops (-5[1])into slate, phyllite (“FILL-ite”), schist (-5[2])(“shist”), and gneiss (10[1]-5[2])(“nice”). For 10 points, name or describe this property that (10[1])indicates how much rocks (10[1])have transformed (10[1]-5[1])following (-5[1])exposure to heat (10[1])and pressure. ■END■ (10[10]0[4])

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