Geology Terms

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Rock Layers

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Like a cake, rock has layers! They have different colors and textures.

ROCK LAYERS = ROCK STRATA

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Paleontologists

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Law of Superposition

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Definition:

A rule that says the oldest rock layers are always at the bottom, like a stack of pancakes!

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Relative Dating

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Definition:

Figuring out which rock layer is older or younger.

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Horizontal

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Horizontal means something that goes straight across, like a line from side to side, and is flat like the ground. It is the opposite of vertical, which goes up and down.

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Correlation

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CO-RELATION

Correlation is when we show that rocks or geological events from different locations are the same age or very similar in age

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Fossil

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Remains or impressions of extinct organisms preserved in rock.

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Extinct

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Extinct means ALL gone/dead.

Like dinosaurs, no extinct organisms are left alive anywhere.

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Igneous

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Magma

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Definition:

Hot, melted rock found INSIDE the Earth. Like melted candy before it hardens