Mountain ranges on the west coasts of both North and South America are caused by:

A seamount is made of rock that is dated at 5,000,000 years old.  Since the seamount was made, it has moved 100 kilometers from the hotspot where it formed.  What is the RATE of movement (in centimeters per year) of the plate during this time? 

Which of the following is associated with the convergence of two oceanic plates, as illustrated by the Marianna, Tonga, and Puerto Rico trenches?

In general, where a beach is exposed to high energy wave action, the sediment size will be larger than the sediments on a calmer beach. 

The movement of an oceanic plate over an isolated mantle plume will likely result in formation of:

A man is complaining of a severe throbbing headache accompanied by nausea and vomiting, and sensitivity to sound and light. These findings are consistent with which type of headache?

Which of the following is a combination of brittle crust and the solid, brittle upper layer of the mantle?

Where would you be most likely to find coarse terrigenous sediments?

In 1912, Alfred Wegener discovered magnetic anomalies, and demonstrated that midocean ridges are at the center of tectonic plates.

The crust and mantle of the earth are distinguished by their distinct chemical makeups.