ESCI 111 Quiz 2 flashcards |

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The former, late Paleozoic super continent is known as ________.

Pangaea

Which of the following paleoclimatic evidence supports the idea of the late Paleozoic super continent in the Southern Hemisphere?

rocks formed by glaciers in South Africa and South America

The ________ is an example of an active, continent-continent collision.

northward movement of India into Eurasia

Pull-apart, rift zones are generally associated with ________.

a divergent plate boundary

Deep-focus earthquakes, those between 300 and 700 kilometers below the surface, occur only in association with ________.

mid-ocean ridges

A very long-lived magma source located deep in the mantle is called a ________.

hot spot

Linear, magnetic patterns associated with mid-ocean ridges are configured as ________.

normal and reversed magnetized strips roughly parallel to the ridge

Which of the following energy sources is thought to drive the lateral motions of Earth's lithospheric plates?

export of heat from deep in the mantle to the top of the asthenosphere

The continental drift hypothesis was rejected primarily because Alfred Wegener could not ________.

identify a mechanism capable of moving continents

All of the following are evidence supporting the theory of plate tectonics except for ________.

changes in the Moon's orbit due to shifting plates

Deep-focus earthquakes are associated with ________ plate boundaries.

convergent (subducting)

Which one of the following most accurately describes the volcanoes of the Hawaiian Islands?

shield volcanoes fed by a long-lived hot spot below the Pacific lithospheric plate

oceanic crust and lithosphere are formed at ________.

divergent boundaries by submarine eruptions and intrusions of basaltic magma

Cooler, older, oceanic lithosphere sink into the mantle at ________.

subduction zones along convergent plate boundaries

Deep ocean trenches are surficial evidence for ________.

sinking of oceanic lithosphere into the mantle at a subduction zone

A transform plate boundary is characterized by ________.

a deep, vertical fault along which two plates slide past one another in opposite directions

The modern-day Red Sea is explained by plate tectonics theory because it is ________.

a rift zone that may eventually open into a major ocean if Arabia and Africa continue to separate

The volcanoes and deep valleys of east Africa are related to a ________.

continental rift along which parts of the African continent are beginning to slowly separate

________ most effectively outline the edges of the lithospheric plates.

Lines of earthquake epicenters

Deep-oceanic trenches are most abundant around the rim of the ________ ocean basin.

Pacific

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