PUBLIC MUSEUM

SILORIAN PERIOD:

• The warm shallow seas made good conditions for marine life to grow.

DEVONIAN PERIOD:

• Amphibians, meanwhile, became the first four legged animals on land.

CARBONIFEROUS PERIOD:

• The Carboniferous period lasted to about 359.2 to 299 million years ago.

PERMIAN PERIOD:

• Most marine life died, and 80 percent of plants and animals were wiped out.

TRIASSIC PERIOD:

• Many animals died out at the end of the Triassic period, including most of the large amphibians and about 20 percent of the reptiles.

JURASSIC PERIOD:

• During the Jurassic period the huge landmass og Pangea into two pieces-Laurasia to the north and Gondwana to the south.

CRETACEOUS PERIOD:

• During the Cretaceous period flowering plants emerged.
• Flowers bring pollen and eggs close together, making fertilization a sure thing.

TERTIARY PERIOD:

• A line of volcanoes created Central America, joining North and South America.

PLEISTOCENE PERIOD:

• Erosion stops Kenosha-fossils pile up again.

WISCONSIN'S LAST ICE AGE:

• Ice age conditions helped humans migrate to new continents.

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