What is a metamorphic rock with more than 50% platy and elongated minerals, all of which are large enough to be clearly visible?
A)phyllite
B)gneiss
C)slate
D)schist
E)shale

Question

Quizplus · Accepted Answer

Schist is a metamorphic rock with more than 50% platy and elongated minerals, all of which are large enough to be clearly visible. Phyllite and slate also have platy minerals, but they do not have large enough minerals to be clearly visible. Gneiss and shale may have elongated minerals, but they do not have enough platy minerals to meet the criteria of the question.

What Is a Metamorphic Rock with More Than 50% Platy