Exam 3: Drifting Continents and Spreading Seas

According to the figure below,marine magnetic anomalies lay roughly ________ to mid-ocean ridges.

The thickness of clay and planktonic microskeletons is greatest ________.

Evidence of paleomagnetism can be found in ________.

Evidence that the South American and African continents were once joined includes evidence from their coastlines such as ________.

The oldest basalts on the ocean floor are about ________ years old.

If you were using both a compass and a map marked with latitude and longitude to navigate,you might note the angle difference between your compass and what is marked on the map,called ________.

With increasing distance from a mid-ocean ridge,the age of oceanic crust ________.

Wegener's evidence for a united Pangaea comes from the fossil record of which type of organisms?

Which of these is NOT the result of plate tectonics?

The apparent polar-wander path obtained from magnetite crystals in basalts on the North American continent is now interpreted to be primarily the result of ________.