Difference between schistose foliation and gneiss-to foliation?

Answer 1

A schistose foliation would be found in a metamorphic rock with a large amount of micaceous minerals, creating a flaky texturing with easily cleavable layers. Gneiss is more coarse in texture, not as easily cleavable along planes, and contains less micaceous minerals.

Answer 2

Schistose foliation is a type of foliation characterized by the preferred orientation of platy minerals like mica, giving the rock a banded appearance. Gneissic foliation, on the other hand, is a type of foliation in gneiss where light and dark minerals have segregated into distinct bands, often resulting in a striped or layered appearance. Gneissic foliation is typically coarser than schistose foliation.