Geology

The largest time unit on the geological time scale.

A major division on the geologic time scale that is a subdivision of an eon.

The remains or traces of organisms preserved from the geologic past.

The division of the Earth's history into blocks of time.

Covered with or affected by a glacier

Rock formed by the crystallization of molten magma.

Proposed super continent, which 200 million years ago began to break apart and formed the present landmasses.

A scientist who studies fossils and the history of life on earth.

A bsic unit of the geologic time scale that is a subdivision of an era.

That part of geologic time represented by rocks containing abundant fossil evidence.

The theory which proposes that Earth's outer shell consists of individual plates which interact in various ways.

All geologic time prior to the Phanerozoic eon.

A complex procedure of calculating the absolute ages of rocks.

A form of dating by placing rocks in their proper sequence.

Dome-like structures formed when sticky organic filaments of bacteria and algae trap mud.