GLY 101 – Test 3 (Plate Tectonics) – Flashcards

Beneath Earth's lithosphere, the hotter, weaker zone known as the _____ allows for motion of Earth's rigid outer shell.

Which of the following lithospheric plates is not included among the seven largest?

Earth's lithospheric plates are composed of crust and which of the following layers?

Which of the following processes can be observed at the margins of lithospheric plates?

In studies of rock obtained from ocean basins all over Earth, the oldest ages obtained are approximately 200 million years before the present. Why have no older oceanic rocks been discovered?

Currently the Juan de Fuca plate is interacting with the North American plate where inland volcanoes and deep focus earthquakes are occurring. What type of plate boundary is this?

At a divergent boundary, what is the relative motion of the plates on each side of the boundary?

Which of the following statements about divergent boundaries is true?

Movement of plates away from each other at divergent boundaries typically shows which of the following average velocities?

When moving away from a divergent boundary in either direction, which of the following statements is true?

Deep-ocean trenches are formed by _______.

Which of the following statements regarding transform plate boundaries is not correct?

Continued movement of the continental crust on the west side of the San Andreas fault could result in which of the following features?

The occurrence of stream channels that have been offset along a transform fault are indicative of which of the following conditions?

What type of stress is most directly associated with transform faults?

Which of the following geologic processes and/or phenomena is not found at transform plate boundaries?

What two forces drive plate tectonic motion?

The slowly increasing distance between N and S America is due to ____

Layered _______ exposed by erosion can be seen at the Grand Canyon.

Australia is composed of relatively old and thick ______

The extremely deep ocean Marianas trench is a result of _____

________ found in the in the Atlantic ocean is composed of dense and relatively young rock.

Earthquakes that occur in S. California generally occur above a _______

What is the relationship between the crust and lithosphere?

Divergence is to moving away as convergence is to _______.

Plates move apart at __________ boundaries, move together at __________ boundaries, and move side-by-side at __________ boundaries.

Which geologic features are associated with divergent boundaries?

Which geologic features are associated with convergent boundaries?

Where is the youngest ocean floor found?

What would happen to Earth if ocean floor were created at divergent boundaries at a faster rate than it is destroyed at convergent boundaries?

What is a volcanic arc?

Which of the following mountain ranges are examples of continental arcs?

________ was a flora that was widely distributed throughout the once contiguous, late Paleozoic, Southern Hemisphere landmass.

In the early part of the 20th century, ________ argued forcefully for continental drift.

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

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

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

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

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

________ was never proposed as evidence supporting the existence of Pangaea.

A transform plate boundary is characterized by ________.

________ first related the symmetrical magnetic patterns in seafloor basalts to seafloor spreading at a mid-ocean ridge.

What evidence did the Deep Sea Drilling Project find about the dates of rocks in the ocean basins?

Which one of the following is an important fundamental assumption underlying the plate tectonic theory?

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

Which of the following properly describes Mount St. Helens and the other Cascade volcanoes?

What is the typical rate of seafloor spreading in the Atlantic Ocean?

What process is evident at oceanic trenches?

Where in the ocean does oceanic lithosphere sink into the mantle?

Which of the following is not evidence supporting the theory of plate tectonics?

What is the temperature above which magnetite loses its magnetization?

What type of boundary occurs along the Aleutian Islands in the North Pacific?

What type of region is the modern-day Red Sea?

What causes the volcanoes and deep valleys of East Africa?

Which of the following statements applies to the asthenosphere, but not the lithosphere?