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Period: to
Pennsylvanian Epoch
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Period: to
Gzhelian Stage
an age in the ICS geologic timescale or a stage in the stratigraphic column. It is the youngest stage of the Pennsylvanian, the youngest subsystem of the Carboniferous -
Carbon pools present throughtout time period
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Tetrapods Present
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Streptognathodus Isolatus present
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Period: to
Kasimovian Stage
This stage is a geochronologic age or chronostratigraphic stage in the ICS geologic timescale. It is the second stage in the Pennsylvanian (late Carboniferous), -
All modern classes of fungi were present
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Rugosofusulina
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The amniote egg evolved, allowing for further exploitation of the land by tetrapods
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Fusulinid Biozone of Obsoletes Obsoletes
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Streptoghathodus Zethus is present
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collapse of the rainforest ecology
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Period: to
Moscovian Stage
Moscovian is in the ICS geologic timescale a stage or age in the Pennsylvanian. It is the third, or second youngest, subdivion in the Carboninferous Age. -
Limstone is present
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First Appearance of Amonite Genus
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Reptiles underwent a major evolutionary radiation because of the rainforest collapse
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Period: to
Bashkirian Stage
Bashkirian is in the ICS geologic timescale and is the lowest stage or oldest age of the Pennsylvanian Period. -
appearance of the conodont (a primitive chordate with tooth-shaped fossil remains)
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Appearance of the first Fusulinids
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Sauropsids, the earliest forms of reptiles, are Present