Metamorphism and Metamorphic Rocks

Forms by contact metamorphism of mudstones and shales

• Hornfels
• Marble
• Gneiss
• Phyllite

Which of the following best describes the conditions of contact metamorphism?

• Depths are fairly shallow, but temperatures and pressures are so high that the rocks begin to partially melt
• Pressures are fairly low, the rock is in the upper part of the crust, and heat is supplied from a nearby magma body
• Heat is generated by shearing and mechanical movements along faults
• Pressures are very high, the rock is deeply buried, and temperatures raised by the Earth's internal heat

_____ forms from the metamorphism of limestone or dolostone

• Marble
• Quartzite
• Migmatite
• Amphibolite

What foliated, metamorphic rock is texturally intermediate between slate and schist

• Phyllite
• Fault breccia
• Gneiss
• Quartzite

_____ is characterized by the segregation of light and dark-colored minerals into thin layers or bands

• Granitic gneiss
• Garnet hornfels
• Slate
• Quartzite

What type of foliation results from the parallel alignment of abundant, coarse-grained, mica flakes in a metamorphic rock?

• Phyllitic structure
• Schistosity
• Slaty cleavage
• Gneissic banding

Which of the following lists the rocks in the order of increasing grain size and increasing grade of metamorphism?

• slate, phyllite, schist
• schist, slate, phyllite
• slate, schist, phyllite
• phyllite, slate, schist

_____ is typically formed by metamorphism of a sandstone.

• Amphibolite
• Quartzite
• Slate
• Marble

Which of the following rocks would exhibit visible, textural evidence of having undergone some partial melting?

• Slate
• Foliated hornfels
• Fault breccia
• Migmatite

What is the major source of heat for contact metamorphism?

• Heat from a nearby magma body
• Heat from the spontaneous decomposition of micas and feldspars
• Deep burial and heat from the Earths interior
• Heat from grinding and shearing on faults