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SEAN RAMIREZ and CAMERON VALLEY present
ORDOVICIAN 490 MILLION YEARS AGO
The Ordovician Period <ul><li>The Ordovician period is one of six sub-periods in the Paleozoic era. </li></ul><ul><li>The ...
Sub-periods <ul><li>The  Ordovician period has six sub periods including: </li></ul><ul><li>The Ashgillian sub-period </li...
Geography <ul><li>During Ordovician, southern Europe, Africa, South America, Australia, and Antarctica were combined to cr...
Environment <ul><li>Nearly all life was in the oceans </li></ul><ul><li>The only land organisms were very primitive land p...
Ecology <ul><li>Life during this time mostly existed in the ocean, where the previous percentage of marine life had increa...
CEPHALOPODS <ul><li>Cephalopods owe their existence to this time period, and they deserve their own slide. </li></ul><ul><...
INTERESTING FACTS THAT WILL BOTH ASTOUND AND AMAZE YOU •   Cephalopods transfer spermatophores by inserting a modified arm...
SAUCES Our information was gathered via the following resources: •  Encyclopedia Britannica • Wikipedia • Palaeos.com • uc...
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Sean + CJ Ordovician Period

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Sean + CJ Ordovician Period

  1. 1. SEAN RAMIREZ and CAMERON VALLEY present
  2. 2. ORDOVICIAN 490 MILLION YEARS AGO
  3. 3. The Ordovician Period <ul><li>The Ordovician period is one of six sub-periods in the Paleozoic era. </li></ul><ul><li>The Ordovician period started around 490 million years ago. </li></ul><ul><li>The Ordovician period was best known for its marine invertebrates. </li></ul><ul><li>There was also some traces of primitive land plant. </li></ul><ul><li>Early to middle Ordovician's climate included a warm atmosphere. </li></ul><ul><li>Atmosphere contained a lot of moisture. </li></ul><ul><li>There were six main subdivisions in the Ordovician period. </li></ul>
  4. 4. Sub-periods <ul><li>The Ordovician period has six sub periods including: </li></ul><ul><li>The Ashgillian sub-period </li></ul><ul><li>The Caradocian sub-period </li></ul><ul><li>The Llandeilian sub-period </li></ul><ul><li>The Llanvirnian sub-period </li></ul><ul><li>The Arenigian sub-period </li></ul><ul><li>The Tremadocian sub-period </li></ul>
  5. 5. Geography <ul><li>During Ordovician, southern Europe, Africa, South America, Australia, and Antarctica were combined to create the super continent Gondwanaland. </li></ul><ul><li>North America Straddled the equator. </li></ul><ul><li>North America, though, was on a collision course with the micro-continent Baltica. </li></ul><ul><li>Baltica and North America eventually converge. </li></ul><ul><li>The former ocean, Iapetus Ocean, was shrinking due to converging land masses. </li></ul><ul><li>Where the Iapetus Ocean was, mountains began to thrust up in countries like Greenland, Norway, Scotland, Ireland, and some of North America. </li></ul>
  6. 6. Environment <ul><li>Nearly all life was in the oceans </li></ul><ul><li>The only land organisms were very primitive land plants that appeared in late Ordovician. </li></ul><ul><li>Also, mountains began to form in North America during the mid-late Ordovician. </li></ul><ul><li>During this period, some continents were covered my shallow seas. </li></ul><ul><li>In the Cincinnati area, for example, shallow seas and life dominated the Environment, and volcanoes were also constantly erupting because of forces of nature. </li></ul><ul><li>Erosion occurred often which buried several organisms under a layer of sediment. This created a thick layer of mud which encouraged remarkable preservation. </li></ul>
  7. 7. Ecology <ul><li>Life during this time mostly existed in the ocean, where the previous percentage of marine life had increased fourfold because of radiation. The result was a diverse plethora of mollusks, brachiopods and cephalopods, and even the very first jawed fish later on. </li></ul>
  8. 8. CEPHALOPODS <ul><li>Cephalopods owe their existence to this time period, and they deserve their own slide. </li></ul><ul><li>{ Cephalopoda is a Latin term that translates to “head feet”, describing a cephalopod’s typical appearance.} </li></ul>The extravagant amount of evolutionary radiation on Ordovician Earth led to an increased level of consciousness in Paleozoic oceans. Thanks to their development of elaborate organs (tentacles) Cephalopods were (and still are) the most intelligent invertebrates in the world.
  9. 9. INTERESTING FACTS THAT WILL BOTH ASTOUND AND AMAZE YOU • Cephalopods transfer spermatophores by inserting a modified arm into the mantle cavity of a female. • The largest Trilobite ever found was over 2 feet in length. • The Ordovician Period was named after the Welsh tribe “Ordovices” in 1879. • Today in the world, there are over 50000+ species of mollusks in the sea. • Ancestors of several Ordovician animals are more than capable of killing people.
  10. 10. SAUCES Our information was gathered via the following resources: • Encyclopedia Britannica • Wikipedia • Palaeos.com • ucmp.berkeley.edu/ordovician • Holt Biology (book) • Absoluteastronomy.com

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