Question 1

The oldest rocks of the Michigan Basin are __________, and these are found at the Earth's surface __________.

Accepted Answer

The answer of The oldest rocks of the Michigan Basin...

Question 2

_________ is the name given to microcontinents that have attached themselves to larger landmasses, especially the western part of North America.

Accepted Answer

Exotic terranes are microcontinents that have accreted to larger landmasses. This process is common in geological history, particularly in the western part of North America. These terranes have different geological histories and origins compared to the larger fragments of the continent to which they attach.

Question 3

Deep-seated crustal faults dating from Proterozoic may have caused powerful earthquakes with epicenters in __________ during 1811-1812.

Accepted Answer

The powerful earthquakes with epicenters in Missouri during 1811-1812 are known as the New Madrid earthquakes. These earthquakes are thought to have been caused by reactivation of deep-seated faults that date back to the Proterozoic era.

Question 4

The present process of mountain- building in the Andes began during

Accepted Answer

The answer of The present process of mountain- building in...

Question 5

The onset of deposition of molasse sediments in the foreland basin indicates that

Accepted Answer

The onset of deposition of molasse sediments in the foreland basin indicates that the mountain chain has worn down and isostatic uplift has started. As the mountain range continues to erode, the sediments are deposited in the foreland basin, resulting in the filling up of the basin. This is an indication of the initial stage of foreland basin formation.

Question 6

The Black Hills of South Dakota are an example of a

Accepted Answer

The Black Hills of South Dakota are a structural dome, which is a type of geologic structure where the rocks are lifted up into a circular or elongated shape, often due to uplifting from beneath. This is in contrast to a structural basin, where the rocks are downwarped into a bowl shape. The Black Hills are not a metamorphic belt or fault zone.

Question 7

Two of the westernmost structural basins of the United States are named

Accepted Answer

Williston Basin is located in North Dakota and extends into Montana and Saskatchewan, Canada, while the Permian Basin is located in Texas and New Mexico. Anadarko Basin is in Oklahoma and Forest City Basin is in Iowa, which are not westernmost. Michigan Basin is in the Great Lakes region and Appalachian Basin is in the east, which are also not westernmost.

Question 8

The Appalachian Basin is to the Appalachian Mountains as the Williston Basin is to the

Accepted Answer

The Williston Basin is located in the northern United States and extends into Canada, and is associated with the Rocky Mountains. The Appalachian Basin, on the other hand, is located in the eastern United States and is associated with the Appalachian Mountains. The other answer choices (A, C, and D) do not have a clear geographic association with the Williston Basin.

Question 9

In eastern South America (Brazil), at shallow depths underlying the sedimentary deposits of the Amazon River, there are

Accepted Answer

Sedimentary deposits of an inland sea are present at shallow depths underlying the sedimentary deposits of the Amazon River in eastern South America (Brazil). The Amazon River used to flow into an inland sea called the Pebas system during the Miocene era, which deposited sediments in the region.

Question 10

Stretching or weakening of the crust (without rifting) as North America moved over a hot spot may have caused the development of the

Accepted Answer

The answer of Stretching or weakening of the crust (without...

Quiz 9: Continental Tectonics and Mountain Chains

The oldest rocks of the Michigan Basin are , and these are found at the Earth's surface .