Exam One VI

Question 1

Melting of oceanic crust along subduction zones and over large mantle plumes produce

Answer 1

Felsic Magma

Question 2

Around 3 billion years ago, _______ may have been the first continent on Earth

Answer 2

Ur

Question 3

The Iapetus and Proto-Paccific Oceans formed with the break-up of the supercontinent ________ about 700 million years ago:

Answer 3

Rodina

Question 4

The supercontinent ________ bike up around 195 million years ago into the smaller supercontinents Laurasia and Gondwanaland

Answer 4

Pangea

Question 5

Gondwanaland consisted of the following continents except ________:

Answer 5

Asia

Question 6

Laurasia consisted of the following continent except _______

Answer 6

Asia

Question 7

The Basin and Range province of the southwestern U.S formed of crustal

Answer 7

tension when western edge of N. America became a transform margin

Question 8

_________ describes the quasi-periodic aggregation and dispersal of Earth’s continental crust:

Answer 8

Supercontinent cycle

Question 9

The belt of volcanoes along the margins of the Pacific Ocean is referred to as

Answer 9

CircumPacific Ring of Fire

Question 10

_______ is mountain-building by the process of folding and faulting

Answer 10

Orogeny

Question 11

The major geologic feature formed as a result of the Laramide Orogeny was the ________

Answer 11

Rocky Mountain

Question 12

The development of the Rocky Mountains was attributed to _________

Answer 12

Flat-slab subduction as a result of increase in rate of plate convergence

Question 13

A cartoon is a(n)

Answer 13

old and stable part of the continental lithosphere

Question 14

During the Traissic Period about 250 Ma, the ______ was thrusted up and was sutured to the western margin of N. America as a result of convergence along a west-dipping subduction zone:

Answer 14

Sonoma Terrane