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Period: to
cambrian age
Climate was cold -
Climate
The climate was cold, not suitable for organisms to live. -
Life
Invertebrates begin to appear in the oceans. -
Cambrian Explosion
The temperature rises, which allows more organisms to develope. -
Trilobites
Trilobites start to appear on the earth. They were one of the first organisms with eyesight. -
The Boss
The most fearsome predator of the time was the Anomalocaris. It fed on trilobites, worms, and mollusks. -
Plants
The plants that lived at the time were one-celled algae. -
Adaptaion Begins
Adaptation begins with the Wiwaxia, which developed a hard shell, scales, and spikes. However, its bellly was left unprotected, like today's porcupine. -
Pangaea
Pangaea continued to break up. North America and Siberia separated from the Gondwana supercontinent. -
Predators
One predator of the Cambrian age was the five eyed Opabinia, which caught its food with a flexible claw on top of its head. -
Algae and Bacteria
Blue-green algae and bacteria begin to develop along shorelines and lake margins. -
Sea Level
The sea level continued to rise from 30m to 90m. -
First Spinal-Cord Bearing Animal
The first chordate was the Pikaia, which was a small creature that looked like an eel. -
Rock Deposits
The warm, shallow water of the Cambrian period resulted in lage deposits of limestone and dolomite. -
Sea Level Drop
Along with the temperature drop, the sea level also dropped dramatically. -
Fossils
The extinction of Cambrian age arthropods led to the fossils we find today. -
Climate
The temperature drops again, which led to mass extinction. -
end of cambrian age