Seafloor Spreading Flashcard

Front

What are the two features commonly found at divergent plate boundaries?

Back

Mid-ocean ridges and rift valleys.

Front

Where can mid-ocean ridges be found?

Back

In all of Earth's oceans.

Front

What happens when continental crust and oceanic crust come together?

Back

The oceanic plate would subduct under the continental plate.

Front

What is the magnetic pattern of ocean-floor rocks on one side of an ocean ridge?

Back

A mirror image of that on the other side.

Front

What occurs at a divergent boundary?

Back

Plates pull apart.

Front

What is a mid-ocean ridge?

Back

An underwater mountain range formed by plate tectonics.

Front

What is subduction?

Back

The process where one tectonic plate moves under another and sinks into the mantle.

Front

What is the average density of continental crust?

Back

2.8 g/cm³.

Front

What is the average density of oceanic crust?

Back

3.2 g/cm³.

Front

What geological feature is formed at a rift zone?

Back

A valley formed by the pulling apart of tectonic plates.