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Revision history for this page on the wikienMediaWiki 1.13.3Wed, 04 Nov 2026 07:14:14 GMTNaquinDeboer620: New page: Fossils are part of our language, most people have heard of fossils but few if pushed can define precisely what a fossil is. Perhaps, before we provide some information on the fossil colle...
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<p>New page: Fossils are part of our language, most people have heard of fossils but few if pushed can define precisely what a fossil is. Perhaps, before we provide some information on the fossil colle...</p>
<p><b>New page</b></p><div>Fossils are part of our language, most people have heard of fossils but few if pushed can define precisely what a fossil is. Perhaps, before we provide some information on the fossil collecting code it may prove helpful to define what fossils actually are. A fossil is evidence of ancient life that has been preserved by natural processes within the minerals that make up the Earth. Fossils are normally found in association with sedimentary rocks, rock formations that have been laid down in layers, the remnants of loose sediment such as mud, silt and sand that has been compressed and changed into rock. However, this is not always the case, for example, in some metamorphic rocks (sedimentary rocks that have been altered as a result of heat or pressure), can still show evidence of preserved ancient life.<br />
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There are other substances found in nature that can preserve a record of life, such as natural tars and oils (La Brea tar pits in Los Angeles) or amber, the fossilised remains of tree sap. At Starunia in Poland, the remains of an ancient species of Rhinoceros was discovered pickled in a mixture of natural tar and salt water. This fossil dates from around 10,000 years ago, but it was so well preserved that residues from this animal's last meal were found in the stomach.<br />
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Scientists do not limit themselves by placing a strict dividing line between evidence of life that is either organic or preserved as a fossil. The Starunia Rhinoceros and the preserved remains of Woolly Mammoths exhumed from the Siberian tundra demonstrate how blurred the definition between fossils and preserved organic remains can be. When pressed, most palaeontologists would probably consider any evidence of life greater than 10,000 years old to be a fossil. Speaking in rough terms, most items found before the Holocene epoch, the beginning of human civilisation would be regarded as a fossil. In practical terms the question of how to define a fossil is not really an issue as most fossils are millions of years old, indeed many are hundreds of millions of years old, [http://www.factsaboutfossils.com/fossil-news/ fossil news].</div>Fri, 27 Apr 2012 22:26:01 GMTNaquinDeboer620http://www.aalf.org/wiki/index.php?title=Talk:NaquinDeboer620