closeup geological study of pelitic schist a detailed examination of metamorphic rock texture and mineralogy

pelitic schist metamorphic rock geological specimen texture mineral composition layered structure mica flakes quartz feldspar clay minerals foliation processes sedimentary formation geology earth science education closeup identification microstructure grains study 039 internal workings metamorphism rocks mineralogy research collection student resource museum display material visual learning paleontology petrology formations origins aids scientific educational