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This brief discussion of the development of the Geologic Time Scale begins with Nicolas Steno in 1669 whose ideas have become known as the principles of original horizontal deposition and superposition. Next are James Hutton in 1795 and Charles Lyell in the early 1800s who supported the principle of uniformitarianism. The work of William Smith and the principle of faunal succession is also noted. The site goes on to explain how and why the scale is divided as it is.
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Copyright 1996-2000 by The Museum of Paleontology of The University of California, Berkeley; the Regents of the University of California; and The Paleontological Society. No part of the referring document residing on the server may be reproduced or stored in a retrieval system without prior written permission of the publisher, except for educational purposes, and in no case for profit.
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DLESE-000-000-005-215
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'Tour of Geologic Time'
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