when do the first coral reefs appear in the fossil record
Coral Although corals first appeared in the Cambrian period,[28] some 542Â million years ago, fossils are extremely rare until the Ordovician period, 100 million years later, when rugose and tabulate corals became widespread. Paleozoic corals often contained numerous endobiotic symbionts.[29][30]
New France Thus, it extended from Newfoundland to the Canadian prairies and from Hudson Bay to the Gulf of Mexico, including all the Great Lakes of North America.
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Buddhism in Southeast Asia
America's Next Top Model (cycle 1) First aired May 20, 2003