Geologic Time Scale Crossword

Scottish geologist who popularised the revolutionary work of James Hutton
Originated the theory of uniformitarianism—a fundamental principle of geology—that explains the features of the Earth's crust by means of natural processes over geologic time.
The processes that alter the Earth are uniform through time
The theory that Earth has been affected in the past by sudden, short-lived, violent events, possibly worldwide in a scope
A record of the life forms and geological events in Earth's history
Largest, most general division of time
a major division of time that is a subdivision of an eon and is itself subdivided into periods
A division of time that is a subdivision of a period
A fossil formed when an animal, plant, or other organism dies and is covered by sediment, its flesh decays and bones deteriorate due to chemical reactions, and a cavity remains below the ground surface.
Minerals gradually enter into the cavity, resulting in a cast.
A thin object; such as a leaf that falls into sediment can leave an imprint when the sediment hardens into rock
Fossils of organisms that have lived during a short, well defined time span
The main plant life of this time were Gymnosperms or plants that produce seeds, but not flowers
Began about 65 million years ago and still continues today
Ancient life, 544 million years ago, lasted about 300 million years
Began with the formation of Earth 4.6 billion years ago
Rock that has formed through the deposition and solidification of sediment