The Paleozoic Era started 542 million years ago with the emergence of complex life forms and ended 251 million years ago with the largest mass extinction the world has ever experienced.
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Paleozoic Era
The Paleozoic Era started 542
million years ago with the
emergence of complex life forms
and ended 251 million years ago
with the largest mass extinction the
world has ever experienced
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It is the oldest and longest era of
the Phanerozoic Eon. The era is
usually broken down even further
to six main periods:
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Cambrian: 542 to 488.3
million years ago
Ordovician: 488.3 to 443.7
million years ago
Silurian: 443.7 to 416 million
years ago
Devonian: 416 to 359.2
million years ago
Carboniferous: 359.2 to 299
million years ago
Permian: 299 to 251 million
years ago
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Trilobites
-probably the most successful animal
during the Paleozoic Era is The
Trilobite.
TRILOBITE
- a small arthropod
- trilobites average in size between 1
and 4 inches
-trilobites fossils have been found
worldwide in marine rocks suggesting
they never made the "transition" to land
-although now extinct they were
roughly 17,000 species of trilobites
during their peak.
-their abundance and variety in the
fossil record have made trilobite
important and useful in studying earth's
history
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- the end of the paleozoic era was marked by a mass
extinction named "THE PERMIAN EXTINCTION"
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The Permian Extinction
The largest mass extinction in earth's
history occurred 251 million years
ago where 96% of all marine life and
70% of terrestrial life went extinct.