By Ryan Erickson 6 th Hour Relation To The State The period is related to the state of Pennsylvania It is named after the coal deposits in Pennsylvania that formed during the period Date of Pennsylvanian Period ID: 234215
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Slide1
Pennsylvanian Period
By: Ryan Erickson
6
th
HourSlide2
Relation To The State
The period is related to the state of Pennsylvania
It is named after the coal deposits in Pennsylvania that formed during the period
?Slide3
Date of Pennsylvanian Period
318 MYA-299 MYA
Late part of Carboniferous Period (359 MYA – 299 MYA)Slide4
Continental Position/Activity
Laurussia
(North America and Europe) and Siberia formed
Laurasia
Parts of
Gondwana
(southern supercontinent) drifted north
Pangaea (single supercontinent) was starting to form at the end of Pennsylvanian Period (299 MYA)Slide5
Climate and Vegetation
Ice covered most of Southern Hemisphere (
Gondwana
) from Karoo Ice Age (360 MYA – 260 MYA)
Large tropical swamps formed near equator
The organic matter from these swamps formed the period’s well-known coal deposits over millions of yearsSlide6
Atmosphere
The large tropical swamps created a surplus of oxygen (from photosynthesis – taking in carbon dioxide and returning oxygen)
Atmospheric oxygen levels reached 35% (some of the highest in all of history)Slide7
Immense InsectsThe astronomical atmospheric oxygen levels of the period created some of the largest insects in history
Meganeura
ArthropleuraSlide8
Immense Insects (continued)
Meganeura
Massive insect resembling a dragonfly
Could have wingspan of 70 cm (27.56 in)
Carnivores (ate insects)
Arthropleura
Massive arthropod resembling a millipede
Could be 2 meters in length (80 in.)
Herbivores (had mouthparts for eating
and chewing plants)Slide9
Reptiles
The first reptiles appeared during the Pennsylvanian Period
One of the first reptiles was the
hylonomus
lyelli
Hylonomus
lyelli
The earliest known reptile
Lizard-like
Carnivores (feed on millipedes and insects)
20 cm (8 in.) long including tailSlide10
Citations"
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