Exam 19: Plate Tectonics

In the early 1900s the German meteorologist _____ made a strong case for continental drift.

The Rift Valley in East Africa is an example of a _____.

In this hypothesis the two sides of the mid-oceanic ridge are moving in opposite directions like slow conveyor belts.

The San Andreas Fault is a transform fault.

Magma that is created by ocean-continent convergence forms either island arcs or belts of igneous activity on the edges of continents.

Young mountain belts, with their associated igneous intrusions, metamorphism, and fold-thrust belts, form at convergent boundaries.

During extension in divergent plate boundaries a rift valley forms as a central ____.

Sea-floor spreading implies that sea-floor rocks should be ______________.

One possible mechanism for plate tectonic drive is ____.

An island arc is a string of volcanoes parallel to the oceanic trench

The apparent movement of the magnetic poles through geologic time is called _____.

Wegener reassembled the continents to form the super continent _____.

Plumes form ______ that are related to areas of active volcanism such as Iceland, Yellowstone and Hawaii.

____ volcanoes can be found along subducting plate boundaries.

Pangea initially separated into two parts, a northern supercontinent, and a southern supercontinent.

Young mountain belts with their associated igneous intrusions, metamorphism, and fold-thrust belts form at _______.

One kind of convergent plate boundary is ____.

Wegener's theory of continental drift proposed that the continents plowed through oceanic crust.

Alternating positive and negative polarity magnetic anomalies in the crust form a stripe-like pattern parallel to _____.

Wegener reassembled the modern continents to form the giant super continent of Gondwanaland.