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The Terreneuvian: A Very Old Time
The Terreneuvian is a very old time in Earth's history. It is the earliest part of something called the Cambrian. Many new kinds of tiny sea animals began to appear then.
This time started about 538.8 million years ago. It began when scientists found special tracks in the mud. These tracks were made by tiny worms a long time ago. The Terreneuvian ended about 521 million years ago. That is when the first trilobites, small sea creatures with hard shells, appeared.
The name Terreneuvian comes from the French words for Newfoundland, an island in Canada. Important rocks from this time were found there. These rocks helped scientists learn about Earth's early history.
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