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Transcript of Pennsylvanian Period
the atmosphere than today. Coal swamps and forests covered most
of the area near the equator. Glaciated areas blanketed the
Northern and Southern poles. Oxygen levels were caused by
the many ferns and plants
that began to grow. Giant insects
like... Organisms Brachiopods Myriapods Bryozoa A variety of animals lived
in the ocean as well as on land. Dragonflies Cockroaches
and Diplovertebron Underwater moss
animal G iant cenipedes and milipedes Lampshelled organisms. Landmasses Laurasia collided with Gondwana to soon
form the supercontinent Pangaea near
the end of the Pennsylvanian. 60 cm amphibian also called meganeura 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. Many fish and shark-like
organisms began to evolve as
well as reptiles and amniote eggs End of Pennsylvanian:
The end of the Pennsylvanian consisted of a mass extinction of invertabrates caused by climate change.