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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source (fŏs'əl) The remains or imprint of an organism from a previous geologic time.

Cuvier established amongst the scientific community the fact of extinction.Scientists now have accurate methods (see below ) for dating fossils.methods rely on characteristic faunal and geological patterns to bracket the period when the fossil existed.But to give a very brief summary: The first known vertebrate fossils, found at the Chengjiang locality in China, date back to the early Cambrian.These early vertebrates, such as Haikouichthys, are small, tapered, streamlined animals showing eyes, a brain, pharyngeal arches, a notochord, and rudimentary vertebrae.Since the 1960s, the scientific literature has reported the presence of…Several years ago, the paleontological world heralded the discovery of a fossil called Tiktaalik roseae.


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