Plate Tectonics

Outermost ridge layer of the Earth.

The upper layer of the Earths mantle. (Below the Lithosphere.)

The region above the stratosphere and below the thermosphere.

The Earth’s innermost part.

The Earth’s outermost part.

An elastic wave in the earth produced by an earthquake or other means.

The thin part of the earth’s crust that underlies the ocean basins.

The thick part of the earth’s crust that forms the large landmasses.

The degree of compactness of a substance.

A researcher that discovered the continental drift.

The gradual movement of the continents across the earth’s surface through geological time.

An actively deforming region where two tectonic plates or fragments of the lithosphere move toward one another and collide.

A linear feature that exists between two tectonic plates that are moving away from each other.

Where two of the tectonic plates slide alongside each other.

the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.

A supercontinent.

The northernmost of two supercontinents.

The name given to the more southerly of two supercontinents.

An extinct small aquatic reptile of the early Permian period.

Glossopteris is the largest and best-known genus of the extinct order of seed ferns known as Glossopteridales.