Exam 2: Plate Tectonics: The Unifying Theory

Who first described world tectonics in terms of rigid plates?

Which of the following locations is least likely to have active volcanoes?

Where is one of the best places to study seafloor spreading on dry land?

The Great Rift Valley of East Africa is an early-stage

Given the current plate configuration we would expect the distance between which of the following cites to increase?

Which of the following is commonly used to determine the age of seafloor samples recovered by the deep-sea drilling project?

Approximately how deep (below sea level)are the deepest deep-sea trenches?

The west coast of South America is

Assuming that the direction and rates of plate movement will remain constant for the next 50 million years,how will the distance between London and New York change?

Which type of measurements initially led to determining the rate of plate movement with a high degree of accuracy?

Mount St.Helens is part of the

Which of the following plates is the largest?

Most transform-fault boundaries are typically associated with

How deep are plates subducted?

Shallow focus earthquakes are associated with which type of plate boundary?

How old are the fossils of the reptile Mesosaurus found in Africa and South America that suggest the two continents were once together?

At what type of plate boundary do the deepest earthquakes occur?

Modern seafloor spreading rates range from

Isochrons on the seafloor are roughly __________ the ridge axis along which they were created.

Where is the best place to explore the mid-ocean ridge as it comes on land?