Exam 13: Mountain Building and Continental Frameworks

The rock sequences and mountainous topography of the northern portion of the Appalachian Mountains ________.

Low elevation rounded mountains and hogbacks underlain by thrusts and folds in easily-eroded Mesozoic and Cenozoic strata are found in this part of the Rockies.

An Andean or Aleutian margin has the biggest accretionary wedge?

On an Andean-type convergent margin, the continental block contains the ________.

What did the earliest continental crust resemble?

The east coast of North America is a good example of a ________ tectonic margin.

What is the Meguma Zone in Nova Scotia (and similar rocks beneath the more southerly, continental shelf off the US eastern seaboard)thought to represent?

What other types of forces contribute to vertical (up or down)crustal motions other than plate convergence and isostatic compensation?

The western two ranges of the Canadian Rockies are mostly underlain by Proterozoic through Paleozoic limestones and shales.

The oldest rocks are about ________ and found in ________.

A ________ is a ridge of steeply inclined, resistant strata exposed along the edges of an uplifted block of older rock.

Despite the repetitive nature of Wilson cycles, give three reasons or variables that make each mountain belt unique.

Early in Earth's history major crustal growth occurred between ________ billion years ago.

The ________ have crust about twice as thick as normal.

The ________ is the global tectonic cycle that rifts supercontinents, developes extensive passive margins, opens ocean basins, closes ocean basins, creates new island arc or Andean crustal orogens, and finally builds new collisional mountain belts as the ocean completely closes to make a new supercontinent.

Which statement best describes an intracratonic basin?

Topographically high-standing, mountainous areas generally ________.

Mountain belts are, or were generally formed ________ plate boundaries.

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Volcanic island arcs and granitic, batholithic zones develop along convergent margins on the overriding plate above an oceanic plate sinking into the mantle.