Mississipian Period By: Athena Higgins and Arpita Chaudhuri

Timeline created by arpitac123
  • Period: to

    Mississippian Period

  • Erosion

    During the early part of the period, sediments were being eroded from the Acadian Mountains to the east and from the Canadian shield to the north.
  • Erosion 2

    Erosion 2
    Clay, silt, and fine-grained sand settled in the Ohio sea as the offshore portion of the Catskill Delta to the east
  • Period: to

    Tournasian Epoch

  • Laurasia

    Supercontinent Laurasia consisted of North American and Eurasion continents.
  • Gondwana

    South America, India, Australia, Africa, and Anarctica combined to make the supercontinent Gondwana
  • Flooding and Reefs= calcium carbonate limestone

    Flooding and Reefs= calcium carbonate limestone
    Low-lying parts of coninents flooded again as sea levels rose and fell.
    Reef-building organisms then laid down huge deposits of calcium carbonate. They are now thick layers of limestone.
  • Ice Age

    Beginnning of Karoo ice age
  • Trees

    Large primitive trees develope.
  • Rocks

    Rocks consist primarily of erosion-resistant sandstones and sandy shales that form prominent cliffs
  • Forests

    Forests consisting of ferns, mosses, horsetails and gynosperms.
  • Period: to

    Visean Epoch

  • "Coal Swamps"

    "Coal Swamps"
    Tropical rainforests and swamps rich with vegetation that would later become coal beds grew on exposed land, and shallow, tropical seas covered large regions of the present-day American Midwest and South.
  • Oxygen

    Oxygen levels increase
  • Vertebrates

    Vertebrates appear on land
  • Insects

    First winged insects appear.
  • Fossils

    Mississippian marbles and limestones were filled with fossils of flower-like invertebrates called crinoids, intricate corals, and other Paleozoic carbonate organisms. (Now exposed throughout the American Midwest.)
  • Period: to

    Serpukhiovian Epoch

  • Appalachian Mountains

    Appalachian Mountains
    Collision between Africa and Eastern North American created the Appalachian mountains.
  • Muddy Seas

    Muddy seas persisted across the area that is now Ohio. They were not favorable for many bottom-dwelling invertebrates. Few were well preserved in these rocks.