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Pennsylvanian Period
8
Pennsylvanian Period
Sea levels rose and fell repeatedly because of melting and freezing of ice.
The coal swamps made then are still in use today
for oil.
Laurasia collided with Gondwana to soon
form the supercontinent Pangaea near
the end of the Pennsylvanian.
End of Pennsylvanian:
The end of the Pennsylvanian consisted of a mass extinction of invertabrates caused by climate change.
END
Myriapods
Many fish and shark-like
organisms began to evolve as
well as reptiles and amniote eggs
G iant cenipedes and milipedes
Underwater moss
animal
A variety of animals lived
in the ocean as well as on land.
Bryozoa
Lampshelled organisms.
Organisms
Brachiopods
Dragonflies
Giant insects
like...
also called meganeura
60 cm amphibian
Cockroaches
and
Diplovertebron
Began 323 million years ago and ended 290 million years ago. Occurred in Paleozoic Era after the Mississipian.
Oxygen levels were caused by
the many ferns and plants
that began to grow.
Coal swamps and forests covered most
of the area near the equator.
Environment
40% higher oxygen level in
the atmosphere than today.
Glaciated areas blanketed the
Northern and Southern poles.
Landmasses
Climate
Hot and humid near the equator with a lot of rain
The climate varied depending on the location on the Earth.
Freezing and arid at poles.