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Published byLucy Francis Modified over 9 years ago
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Plants consisted mostly of green and red algae. It is said that the first land plants evolved from algae. Besides algae, another type of plant was moss. There has been found evidence tetrahedral spores that are similar to those of primitive land plants, suggesting that plants invaded the land at this time.
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The Ordovician was the period of the marine animals. Some of the animals are: primitive fish, cephalopods, corals, crinoids, and gastropods. There are two types of cephalopods: Cloeoidea and the Nautiloidea.
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During the Ordovician, many of the landmasses were aligned in the tropics. This likely caused the mass extinctions that characterize the end of the Ordovician period, in which 60% of all marine invertebrate genera and 25% of all families went extinct. While also being a source of abundant fossils and in some regions major reservoir of oils and gasses. It is the second of six periods of the Paleozoic era, lying between the earlier Cambrian period and the later Silurian period.
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Climate was fairly warm during the first few parts From the early to middle Ordovician, the earth experienced a milder climate in which the weather was warm and the atmosphere contained a lot of moisture. When Gondwana finally settled on the South Pole during the Late Ordovician, massive glaciers formed causing shallow seas to drain and sea levels to drop. At the end of the Ordovician period, the climate eventually grew very warm and then, even hotter.
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Nearly all life on Earth was in oceans. Mass extinction, in which 60% of all marine invertebrate and 25% of all families went extinct. Large meteorite impact may have been responsible for the mass extinction marking the end of the Cambrian Period and the start of the Ordovician Period
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wwww.fossils-facts- and- finds.com/ordovicianperiod hhttp://www.britannica.com/facts/11/764 880/Ordovician-period-as-discussed-in- Earth hhttp://park.org/Canada/Museum/extinc tion/ordmass.html wwww.encyclopedia.com/topic/ordovici an_period.aspx hhttp://www.ask.com/questions- about/Geology-in-the-Ordovician-Period
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