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The Ordovician Period

By:Emily Sparrow and Karsyn Lockhart

Picture Sources

  • "Coral Reef Fish Tank." Free Stock Photo. N.p., n.d. Web. 20 Apr. 2016.
  • "Sponge." Wikipedia. Wikimedia Foundation, 29 Mar. 2016. Web. 20 Apr. 2016.
  • "Trilobite." Wikipedia. Wikimedia Foundation, 19 Apr. 2016. Web. 20 Apr. 2016.
  • "Cephalopod Intelligence." Wikipedia. Wikimedia Foundation, 15 Feb. 2016. Web. 20 Apr. 2016.

Basic Facts

Animals

Events/Features/Changes

  • An interval of mass extinction near the end of this time period. The mass extinction of the end of the Ordovician was ranked second in severity to the one that occurred at the boundary between the Permian and Triassic periods in terms of the percentage of marine families affected.
  • Ice caps began to cover what is now North Africa.
  • Warm, shallow seas covered most of the Earth.
  • Annelids
  • Crinoid
  • Cephalopod
  • Trilobite
  • Brachiopods

Plants

Cephalopod

Trilobite

Was a mollusk, mostly related to modern day octopus and squid.

Was a resilient bug who lived very long into the Paleozoic Era.

Corals

  • Years: 505 to 438 million years ago.
  • The rocks of this time period are usually found on the highest elevation on Earth (Mount Everest).
  • The second period of the Paleozoic Era.
  • The Ordovician time period was one of great increase in diversity in habitats and creatures, this was called “Ordovician Radiation.”
  • Ordovician radiation began in shallow marine environments and then got to deeper water.

Sponges

  • Two types:hard (internal skeleton made of limestone) and soft (no skeleton)
  • Soft corals look like plants
  • Hard corals have 12 or more tentacles
  • Soft corals have 8.

Sources

  • Live at the bottom of almost all oceans
  • 5,000 different types of sponges that range in different shapes and sizes.

  • "Are You a Member of One of These Libraries?" Credo. N.p., n.d. Web. 18 Apr. 2016.

http://search.credoreference.com.scsl.idm.oclc.org/content/entry/columency/ordovician_period/0?searchId=96291b25-0569-11e6-8399-0e58d2201a4d&result=0

  • "Ordovician Period." Britannica School. Steven M. Holland - Professor of Geology, University of Georgia, Athens., n.d. Web. 18 Apr. 2016. http://school.eb.com/levels/middle/article/117443
  • Corals. (2008). In C. Love & C. Stamps (Eds.), Animals: A visual encyclopedia. London, United Kingdom: Dorling Kindersley Publishing, Inc.. Retrieved from http://search.credoreference.com/content/entry/dkanimals/corals/0

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