Geological Concepts Flashcards

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Anomalies

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Something out of the ordinary. Unlikely to be repeated.

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Earth's age

Back

4.6 billion years; 4600 million years ago

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Emergence

Back

When strata that was once under water is now dry land.

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Events that disturb (overturn) the position of the rock layers

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Faults, Folding and Igneous Intrusions always take place after the original rock layers were deposited.

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Extrusion

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When molten rock flows onto earth's layers

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Fauna

Back

Animal life

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Flora

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Plant Life

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Folds

Back

When rock layers bend because of crustal (plate) movement.

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Fossils

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Are the preserved remains or traces of ancient life.

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Geologic time

Back

The entire time that Earth has existed. It is divided up into units and subunits which are: eons --> eras --> periods --> epoch