Home Chapter 10 Concept #4 Quiz

# Concept #4 Quiz

Choose the best possible answer to the following questions about Key Concept 4 "Folds – bends in rocks."

a dome

This activity contains 8 questions.

## Which of the following is consistent with deformation by “folding”?

 the crust is thinned and extended horizontal distance is shortened perpendicular to the fold axis the crust is stretched and elongated horizontal distance is lengthened perpendicular to the fold axis

## Identify the indicated parts of a plunging fold by selecting the correct response. (Plunging fold diagram, Copyright © Prentice Hall, Inc.)

This question presents 4 items numbered 2.1 through 2.4. Each item is presented with a pulldown menu containing the letters A through D. For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
2.1 plunge A B C D A B C D A B C D A B C D

## Match the name of a type of fold with the appropriate description:

A matching question presents 4 answer choices and 4 items. The answer choices are lettered A through D. The items are numbered 3.1 through 3.4. Screen readers will read the answer choices first. Then each item will be presented along with a select menu for choosing an answer choice. Using the pull-down menus, match each item in the left column to the corresponding item in the right column.
 limbs dip toward the center, hinge lines are horizontal or plunging, but straight, youngest rocks in the center limbs dip toward the center, hinge lines are arched, not straight, youngest rocks in the center limbs dip away from the center, hinge lines are horizontal or plunging, but straight, oldest rocks in the center limbs dip away from the center, hinge lines are arched, not straight, oldest rocks in the center
3.1 basin A B C D A B C D A B C D A B C D

## Which of the following are true of anticlines, but not synclines? Choose all that apply.

 After erosion, the younger strata are exposed along the axial region of the fold. The deeper strata are buckled upward along the fold axis. The limbs are inclined (dip) away from the fold axis (central part of the fold). Many anticlines are asymmetric and some may have plunging axes. The limbs are inclined (dip) towards the fold axis (central part of the fold).

## Identify the type of fold indicated by selecting the correct response:

This question presents 4 items numbered 5.1 through 5.4. Each item is presented with a pulldown menu containing the letters A through D. For each item below, use the pull-down menu to select the letter that labels the correct part of the image.
5.1 symmetrical syncline 5.2 asymmetrical anticline [hint] A B C D [hint] A B C D [hint] A B C D [hint] A B C D

## Which of the following is NOT a difference between an “anticline” and a “syncline,” the different types of folds?

 anticlines have older rocks in their middle (core) zone / synclines have younger rocks in their middle (core) zone the two types are inverted relative to each other anticlines "open" upward, whereas synclines "open" downward anticlines "open" downward, whereas synclines "open" upward

## Which of the following are true of basins, but not domes? Choose all that apply.

 Strata are oriented in more or less a circular pattern. Outcrops of the oldest strata are in the center of the basin, but on the sides of the domes. Outcrops of the youngest strata are in the center of the basin, but on the sides of domes. Strata are dipping outward away from the center of the basin.

## Using the map of Michigan below, showing Paleozoic strata in roughly circular pattern surrounding a core area of Pennsylvanian rocks, determine the type of structure the strata define.

 graben syncline dome anticline horst basin