Paleozoic Era Events

Front

Continents moved together, forming a supercontinent called Pangea.

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Paleozoic Era: 544-300 million years ago

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The Appalachian Mountains formed.

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Paleozoic Era: 544-300 million years ago

Front

Ocean basins were very large, so water drained into them.

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Paleozoic Era: 544-300 million years ago

Front

Pangea began to break apart

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Mesozoic Era: 252-145 million years ago

Front

Conditions of the seas and land during the Paleozoic Era

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The seas were shallow, and the land was dry.

Front

The worst mass extinction event in Earth’s history, where about 90% of all ocean’s species and 70% of all land species died out.

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Paleozoic Era

544-300 million years ago

Front

The climate was MUCH warmer than today.

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Mesozoic Era: 252-145 million years ago

Front

The Atlantic and Arctic ocean bases were formed by forces above the ground (erosion) or below the ground (earthquakes) created new ocean bases.

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Mesozoic Era

252-145 million years ago

Front

Ocean basins shrunk, such as the Pactific Ocean.

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Mesozoic Era

252-145 million years ago

Front

Formation of the Rocky and Sierra Nevada Mountains

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During the Mesozoic Era, 252-145 million years ago.