Concept #3 Quiz

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Concept #3 Quiz
Choose the best possible answer to the following questions about Key Concept 3 "Common metamorphic rocks."

This activity contains 5 questions.

Match the following rock names to the appropriate description:

Using the pull-down menus, match each item in the left column to the corresponding item in the right column.


	loosely coherent rock composed of broken fragments that formed along a fault zone

	very fine-grained and foliated with excellent rock cleavage

	foliated, composed predominantly of platy minerals, like micas, and porphyroblasts like garnet

	represents a metamorphic grade between slate and schist

	composed of alternating bands of light and dark silicate minerals

	calcite-rich, often nonfoliated

	hard, nonfoliated rock resulting from contact metamorphism

1.1 hornfels

1.2 gneiss

1.3 schist

1.4 slate

1.5 phyllite

1.6 breccia

1.7 marble

Why do some metamorphic rocks form foliation (foliated rocks) whereas some metamorphic rocks form no foliation (nonfoliated rocks)? Choose all that apply.

In general, foliated rocks form from metamorphism of parent rocks that have variable mineral content, whereas nonfoliated rock parent rocks are composed of only one or a few different minerals. Foliated rocks form from contact metamorphism where confining pressure was involved, whereas nonfoliated rocks form from regional metamorphism where differential stress was involved.Foliated rocks form from regional metamorphism where differential stress was involved, whereas nonfoliated rocks form from contact metamorphism where confining pressure was involved. Foliated rocks form from metamorphism of parent rocks composed of only one or a few different minerals, whereas nonfoliated rocks form from parent rocks that have variable mineral content.

Identify the indicated rock type by selecting the correct response. (Metamorphic rock classification chart, Copyright © by Prentice Hall, Inc.)

The letters A through F appear on an image associated with this question.

The letters A through F appear on an image associated with this question.

For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
3.1 quartzite

3.2 schist

3.3 slate

3.4 phyllite

3.5 gneiss

3.6 marble

What is interpreted as the “parent rock” of the metamorphic rock marble (the one that reacts with acid) and why?

sandstone – it’s composed of the mineral quartz exclusively, as is marble.limestone – it’s composed of the mineral calcite exclusively, as is marble. sandstone – it’s composed of the minerals calcite and quartz, as is marble. limestone – it’s composed of the minerals calcite and quartz, as is marble.

Match the rock name with the best description and/or appropriate type of metamorphic environment:

Using the pull-down menus, match each item in the left column to the corresponding item in the right column.


	mostly nonfoliated rock formed by any type of metamorphism of a rock composed of calcite

	extreme regional metamorphism that caused the rock to partially melt

	foliated, fine- to medium-grained rock formed from shale during regional metamorphism

	coarse-grained rock with alternating bands of light and dark minerals

	nonfoliated rock formed by contact/thermal metamorphism

5.1 migmatite

5.2 phyllite

5.3 gneiss

5.4 marble

5.5 hornfels

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