Chemistry
Chemistry, 14.02.2020 18:56, vinniemccray70

The quartz in granite begins to melt at 650°C, so if we find a migmatite where quartz has melted in a granitic rock and we know the temperature in the region increased with depth by about 25°C per kilometer, we could estimate the depth that the rock had been at to be about .
a. 12.5 km
b. 18.0 km
c. 23.5 km
d. 26.0 km

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