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Unformatted text preview: common in Triassic and younger rocks. Modern scleractinian corals have some symbiotic dinoflagellates, known as zooxanthellae, living inside the coral. Both groups seem to appear in the fossil record at approximately the same time, suggesting the symbiosis was a valuable relationship. Another group of phytoplankton that appeard at the end of the Triassic was the coccolithophorids, usually shortened to coccoliths. These small fragments of a much larger, yet still microscopic, creature collect calcium carbonate from the seawater and use it to build their small "skeletons". Below is an electron micrograph of a coccolith collection formed by a modern alga....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10