GLG 101 Exam 2 Ch 7 PVCC | Questions with 100% Correct Answers | Updated & Verified

What are the effects on metamorphic minerals and textures of temperature, confining pressure and differential stress? - Temp increses dehydsrates the rocks, confining the rocks, compacting them. Differential stresses produces foilation dues to stress in 1/2 directions Describe the role of fluids during metamorphism and metasomatism - Fluids speed up chemical reactions at lower temperature Compare the pressure and temperature condition of regional and contact metamorphism. How do regional metamorphic rocks commonly differ in texture from contact metamorphic rocks? - Contact metamorphic get heated up (not Foliated) regional are heated and pressurized produced foliation. What is the metamorphic grade? Describe what happens to (a) a shale and (b) a basalt as they are subjected to increasingly high-grade metamorphism - Degree at which rocks have been cooked (degree of metamorph) shale under low grade turns into slate, then phyllite, schist gneiss low ---- high Basalt ---- hornfels How would you distinguish between (a) schist and gneiss? (b) slate and phyllite? (C) quartzite and marble? (D) granite and gneiss? - (A) - Schist is not bonded gneiss is bonded (B) - slate is dull phyllite shiny (C) - Quartzite does not react to acid marble will (D) - gneiss bonded, granite is not bonded (igneous)