Metamorphic Rocks- Exam Questions Answered Correctly Latest Update 2024

Metamorphic Rocks- Exam Questions Answered Correctly Latest Update 2024 The temperature of the intrusive magma has little effect on the metamorphic minerals formed. - Answers False Rocks that have been changed from previously existing rocks (but that were not completely melted) by the action of heat, pressure, and associated chemical activity are: A) intrusive rocks. B) igneous rocks. C) metamorphic rocks. D) sedimentary rocks. E) punk rocks. - Answers C) metamorphic rocks. Metamorphic rocks can indicate the chemical changes that have occurred at various depths. - Answers True The reaction of country rock with solutions from a cooling magma is known as A) hydrothermal solution. B) hydroxide alteration. C) geothermal alteration. D) hydrothermal alteration. E) hydrostatic alteration. - Answers D) hydrothermal alteration. The intensity of regional metamorphism may be recognized by: A) index of recrystallization. B) index fossils. C) index minerals. D) index polymorphs. E) index cards. - Answers C) index minerals. An isograd represents a line of equal metamorphic intensity or grade. - Answers True Which of the following rocks may be associated with contact metamorphism? A) gneiss B) slate C) hornfels D) B and C E) none of the above - Answers D) B and C ?? Divergent plate boundaries are characterized by: A) hydrothermal alteration and contact metamorphism. B) regional and contact metamorphism. C) regional and dynamic metamorphism. D) dynamic and contact metamorphism. E) hydrothermal alteration and dynamic metamorphism. - Answers A) hydrothermal alteration and contact metamorphism. The blueschist facies is associated with relatively low temperature and high pressure along subduction zones. - Answers True Metamorphic rocks are the oldest known rocks. - Answers True Which of the following correctly lists metamorphic mineral assemblages in order of decreasing temperature/pressure of formation? A) chlorite, biotite, garnet, staurolite, kyanite, sillimanite B) biotite, garnet, chlorite, staurolite, sillimanite, kyanite C) garnet, biotite, chlorite, sillimanite, staurolite, kyanite D) sillimanite, staurolite, kyanite, garnet, biotite, chlorite E) sillimanite, garnet, kyanite, staurolite, biotite, chlorite - Answers D) sillimanite, staurolite, kyanite, garnet, biotite, chlorite Metamorphism of a mudstone will produce slate, schist, gneiss, and hornfels. - Answers True Metamorphic rocks are those which A) are claimed to have certain metaphysical properties, e.g., quartz crystals. B) have mineral compositions altered from those originally present by increased temperature and pressure. C) have textures altered from those originally present by agents such as water and volatile magmatic fluids. D) have chemical compositions altered from those originally present by agents such as organisms and tectonic plates. E) B and C - Answers E) B and C The word elements meta and morph are Latin for A) hidden and shape. B) hidden and rock. C) change and rock. D) change and shape. E) hidden and body - Answers D) change and shape. Metamorphism is a physical and chemical change that occurs in such a way that: A) disequilibrium is reached with the new physical and chemical environment. B) a dynamic equilibrium is reached. C) equilibrium with the new environment is disturbed. D) the rock reaches equilibrium with its new environment. E) the rock's chemistry and texture become increasingly unstable. - Answers D) the rock reaches equilibrium with its new environment. Which three processes bring about metamorphism? A) heat, pressure, weathering