What foliated, regional metamorphic rock is texturally intermediate between slate and schist?
A)fault breccia
B)phyllite
C)quartzite
D)gneiss

Question

Quizplus · Accepted Answer

Phyllite is formed from the low-grade metamorphism of shale or mudstone and is characterized by a silky sheen, fine grain size, and a foliation that is intermediate between slate and schist. Fault breccia is a type of rock formed from fragments of pre-existing rock that have been cemented together along a fault zone. Quartzite is a non-foliated metamorphic rock formed from the recrystallization of quartz grains, and gneiss is a foliated rock with a coarser texture than schist, typically formed through high-grade metamorphism. None of these fit the textural description provided.

What Foliated, Regional Metamorphic Rock Is Texturally Intermediate Between Slate