Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


(sphere of a rock)crust and uppermost mantle, rigid shell, 100-250 km in thickness, thick below continent.


estimates the amount of energy released at the housece of the earthquake

richter scale

based on the amplitude of the largest seismic wave recorded

shield volcano

very large, gently sloping mound composed mainly of basaltic lava flows

asthenosphere is located

upper mantle


was an ancient reptile that lived in South America and Africa during the late Paleozoic.

transform fault

a strike-slip fault that forms the boundary between tectonic plates

Early results of the Deep Sea Drilling Project clearly justified the conclusion that

the ocean basins are relatively young; most ocean basin rocks and sediments are Cretaceous or younger in age

On a typical seismogram, ________ will show the highest amplitudes.

surface waves

Spreading center volcanism most generally produces rocks which are

basaltic in composition

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording