Exam 21: Structural G Eology and P Late Tectonics

The deflection of one lithospheric plate under another is called

The three principal types of mountain building are fold, volcanic, and ______________.

The lithospheric plates are believed to be put into motion by the driving force of ______________ cells in the asthenosphere.

The layer of rock immediately below the lithosphere is called the

The part of the mantle located directly below the lithosphere is called the ______________.

Secondary seismic waves travel ______________ primary waves in solids.

When an earthquake occurs, the point of initial energy release is called the earthquake's ______________.

S seismic waves can travel only through ______________.

In 1960, ______________ proposed the concept of seafloor spreading.

3 steps on the Richter scale represents about how many times more energy?

The theory of seafloor spreading was proposed in 1960 by

Seismic waves that travel through our planet are called ______________ waves.

The two general types of earthquake waves are ______________ waves and body waves.

After a major earthquake, the rocks may continue to adjust to their new positions, causing additional vibrations called

Geologists view the part of our planet that is called the ______________ as consisting of a number of close-fitting plates.

Folded rock layers that resemble an arch are called

In 1960, the scientist named __________ proposed the concept of seafloor spreading.

The point of the initial energy release of an earthquake is called the

An earthquake P wave travels through

The sharply defined boundary that separates the crust from the mantle is called ______________.