Snail Bivalve Mollusk - nautiloid Largest animal Carnivore Prey – fish, arthropods Jet propulsion Buoyancy.

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Presentation transcript:

Snail Bivalve

Mollusk - nautiloid Largest animal Carnivore Prey – fish, arthropods Jet propulsion Buoyancy

Less than one foot long First true vertebrates. Mouths permanently open. Ostracoderm

Seedless Plants Can survive on bare rock Dying tissue helps build soil Liverworts

Co2 levels, global temperatures drop. Glaciers form causing sea levels to drop. Highly populated shallow seas are drained.

Advilson, Christina, Jennifer Bie, and Chirag Patel. "The Ordovician Period." The Ordovician Period. University of California Museum of Paleontology. Web. 16 Nov BBC News. BBC, n.d. Web. 3 Dec "Mollusks." Fossil Groups -. N.p., n.d. Web. 01 Dec "Ordovician Period." National Geographic. N.p., n.d. Web. 03 Dec "Ostracoderm." - New World Encyclopedia. N.p., n.d. Web. 30 Nov "Paleoclimate." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 23 Nov PBS. PBS, n.d. Web. 23 Nov Scotese, C.R., “Ancient Oceans Separate the Continents”, Plate tectonic maps and Continental drift animations,PALEOMAP Project ( November 23, "THE ORDOVICIAN PERIOD488 TO 443 Million Years Ago." History of Earth. N.p., n.d. Web. 01 Dec