GEOL 1020 Lecture Notes - Lecture 31: Ordovician, Baltica, Supercontinent
14 Nov 2016
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Document Summary
Keep this in mind: life is water based. Life came from water and it uses water for everything that it does. Reproduction takes places in water, even in deserts. Began approximately 510 million years ago, with the end of the cambrian, and ended around 445 million years ago, with the beginning of the silurian. Perhaps the most eventful occurrence of the ordivician was the colonization of the land. They have thick cell walls that guard against loss of cell water loss. The thick cell walls protect against the tide changing and dehydration. Protects against the sun light that is very hot. Protects against the forces of gravity because of the structural support. Localities of the ordovician: the lake winnipeg algal flora. Cells wall made of a long chain of sugar. Winnipeg is more than a large canadian lake; it is also an area rich with fossil remains of marine plants and animals.
