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Unformatted text preview: found in stromatolites, which are fossilized mats similar to layered microbial mats that certain groups of prokaryotes still form today in salt marshes and warm lagoons. Researchers have also discovered fossils of prokaryotes in Australian sediments that formed around hydrothermal vents. Hydrothermal vents are hot volcanic outlets in the deep-sea floor. 4600 3600 Earth forms. “Big Bang” theory a possibility. The planet was bombarded by huge rock bodies left over from the formation of the solar system. During this period of bombardment, the pounding generated enough heat to vaporize all the available water and prevent seas from forming. Earth’s crust began to solidify....
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- Spring '08
- Biology, hydrothermal vents, Edward Lee Wells, plentiful marine life, present Ocean temperature