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THE DEVONIAN
Life in the Devonian
Sponges with glass skeleton
Hydnoceras left
Hindia above
THE DEVONIAN
Life in the Devonian
Sponges and tabulate coral reefs
THE DEVONIAN
Life in the Devonian
Devonian corals
Rugose
Corals
Petoskey Stone
Tabulate coral
State fossil of Michigan
THE DEVONIAN
Life in the Devonian
Spiriferid brachiopods
THE DEVONIAN
Life in the Devonian
Goniatite cephalopods
Suture pattern more complex than Nautiloid
THE DEVONIAN
Life in the Devonian
Fish
Placoderms expanded rapidly in Devonian
Dunkleosteus
Arthrodires - carnivorous
THE DEVONIAN
Life in the Devonian
Fish
Placoderms expanded rapidly in Devonian
Antiarchs – mud-grubbers
Pterichthyoides above
Bothriolepis right
THE DEVONIAN
Life in the Devonian
Fish
Chondrichthyan fish – cartilagenous fish
Cladoselache
THE DEVONIAN
Life in the Devonian
Fish
Osteichthyan fish – bony or ray-finned fish
Cheirolepis
THE DEVONIAN
Life in the Devonian
Fish
Osteichthyan fish – lobe-finned fish
Led to tetrapods
Dipterus
THE DEVONIAN
Life in the Devonian
Eurypterids
Eurypterus remipes
THE DEVONIAN
Life in the Devonian
Plants
Aglaophyton left
Rhynia center
Horneophyton right
THE DEVONIAN
Life in the Devonian
Plants
Lycopsids
Pteridophytes (seed ferns)
Sphenopsids (Calamites)
THE DEVONIAN
Life in the Devonian
Plants
THE DEVONIAN
Life in the Devonian
Plants
THE MISSISSIPPIAN
The Age of Crinoids
Mississippian named by
Alexander Winchell
in 1870
Named for carbonate rocks
deposited in the
Upper Mississippi
River valley
Lower Carboniferous in
Europe and Canada
THE MISSISSIPPIAN
THE MISSISSIPPIAN
The Age of Crinoids
Acadia highlands reduced
Decrease in muddy
sediments
Paleozoic flooding by
epeiric seas
THE MISSISSIPPIAN
The Age of Crinoids
THE MISSISSIPPIAN
Mississippian Tectonics
THE MISSISSIPPIAN
Mississippian Tectonics
THE MISSISSIPPIAN
The Age of Crinoids
Acadia highlands reduced
Decrease in muddy
sediments
Paleozoic flooding by
epeiric seas
THE MISSISSIPPIAN
The Age of Crinoids
Crinoids abundant
Ooids abundant
Clear, shallow marine water
Salinity higher than normal
Mississippian Lime Bank
THE MISSISSIPPIAN
The Age of Crinoids
Late Mississippian the Kaskaskia sea retreated
THE MISSISSIPPIAN
The Age of Crinoids
Late Mississippian the
Kaskaskia sea retreated
Detrital muds and limestones
formed.
Petroleum reservoirs
Nonmarine shales and
sandstones from erosion
of Acadian highlands
THE MISSISSIPPIAN
The Age of Crinoids
Erosion of Acadian highland
produced Pocono Ss.
Forms resistant ridges of
the Pocono Mtns.
Forms third clastic wedge
THE MISSISSIPPIAN
The Age of Crinoids
Erosion of Acadian highland
produced Pocono Ss.
THE MISSISSIPPIAN
The Age of Crinoids
Life in the Mississippian
Rugose corals common
THE MISSISSIPPIAN
The Age of Crinoids
Life in the Mississippian
Archimedes common bryozoan
THE MISSISSIPPIAN
The Age of Crinoids
Life in the Mississippian
Bivalves uncommon
Goniatite cephalopods
Graptolites go extinct
THE MISSISSIPPIAN
The Age of Crinoids
Life in the Mississippian
Crinoids abundant
THE MISSISSIPPIAN
The Age of Crinoids
Life in the Mississippian
Insects become abundant
Forests include
Seed ferns
(Pteridospermae)
Lycopsids
Sphenopsids
THE PENNSYLVANIAN
The Age of Coal Swamps
Pennsylvanian named by
Henry S. Williams
in 1891
Named for coal-bearing rocks
deposited in
Pennsylvanian
Upper Carboniferous in
Europe and Canada
THE PENNSYLVANIAN
THE PENNSYLVANIAN
The Age of Coal Swamps
THE PENNSYLVANIAN
Orogenic Events
Hercynian Orogeny
THE PENNSYLVANIAN
Orogenic Events
Alleghenian Orogeny
THE PENNSYLVANIAN
The Age of Coal Swamps
Alleghenian Orogeny
THE PENNSYLVANIAN
Orogenic Events
Alleghenian Orogeny
Begins formation of Pangaea
Laurentia and Baltica collide to form LAURASIA
Laurasia and Gondwana collide to form PANGAEA
THE PENNSYLVANIAN
Orogenic Events
Alleghenian Orogeny
THE PENNSYLVANIAN
Orogenic Events
Alleghenian Orogeny

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