Difference between revisions of "Jurassic"

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{{stub}} According to geologists, who believe in the [[theory of evolution]] and/or an Earth that is billions of years old, the '''Jurassic''' epoch (period of time) dated from 203 million years ago to 146 million years ago. It is claimed by evolutionary scientists that this period was between the [[Triassic]] and before the [[Cretaceous]] Periods.<ref>http://www.talkorigins.org/faqs/faq-age-of-earth.html</ref>
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The '''Jurassic''' period of the [[Mesozoic]] Era dated from 203 million years ago to 146 million years ago, after the [[Triassic]] and preceding the [[Cretaceous]] period. It is named for the Jura mountains between [[France]] and [[Switzerland]], which contain many rocks laid down during this period. At this time the supercontinent of [[Pangaea]] began to rotate and break apart, and the southern supercontinent of [[Gondwanaland]] also began to split.<ref>http://www.palaeos.com/Mesozoic/Jurassic/Jurassic.htm</ref>
  
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[[Sauropods]] such as [[Diplodocus]] were supposedly common during this period.
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The period was characterised by a warmer and wetter climate than that of the preceding Triassic, and was dominated by dinosaurs. Notable Jurassic species included [[Stegosaurus]], [[Allosaurus]], [[Igaunodon]], [[Hypsilophodon]] and huge sauropods such as [[Diplodocus]], [[Brachiosaurus]] and [[Apatosaurus]]. The air was ruled by pterosaurs such as ''Dimetrodon'' and ''Rhamphorhynchus'', and the first birds, such as ''[[Archaeopteryx]]'', appeared during the period.  
  
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== Young earth creationist scientists view ==
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In the warm oceans, marine reptiles including [[plesiosaur]]s and [[ichthyosaur]]s were the top predators. The extinct [[cephalopod]] ammonites and belemnites were common.
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[[Young earth creationist]] scientists believe that the [[Theory of evolution|evolutionary]] [[Geology|geological]] timescale is in error. <ref>http://www.trueorigin.org/geocolumn.asp</ref><ref>http://www.icr.org/index.php?module=articles&action=view&ID=54</ref><ref>http://www.allaboutcreation.org/geologic-time-scale.htm</ref>  These scientists believe that the earth is young and has multiple lines of evidence from the field of geology showing that the earth is young. <ref>http://www.answersingenesis.org/home/area/faq/geology.asp</ref><ref>http://www.creationism.org/topbar/geology.htm</ref><ref>http://www.grisda.org/georpts/gr11.htm</ref><ref>http://www.nwcreation.net/geologylinks.html</ref><ref>http://globalflood.org/</ref>  Also, young earth creationist scientists assert that there is an abundance of scientific arguments in addition to geology showing the earth and universe are both approximately 6,000 years in age.<ref>http://www.answersingenesis.org/home/area/faq/young.asp</ref><ref>http://www.answersingenesis.org/home/area/faq/astronomy.asp</ref><ref>http://www.icr.org/article/1842/</ref>  In addition, these scientists have a number of arguments against the position of an extremely old age for the earth and the universe.<ref>http://www.answersingenesis.org/home/area/faq/dating.asp</ref><ref>http://www.answersingenesis.org/home/area/faq/astronomy.asp</ref><ref>http://www.apologeticspress.org/modules.php?name=Read&cat=1&itemid=22</ref>
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Flowering plants had not yet evolved, and the dominant flora were [[conifer]]s, [[fern]]s, [[horsetail]]s and especially [[cycad]]s, some of which grew to the size of modern trees.
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== Young earth creationist view ==
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[[Young earth creationist]]s believe that the [[Theory of evolution|evolutionary]] [[Geology|geological]] timescale is in error and do not believe in the Jurassic period.  
  
 
==References==
 
==References==

Revision as of 19:21, April 25, 2007

The Jurassic period of the Mesozoic Era dated from 203 million years ago to 146 million years ago, after the Triassic and preceding the Cretaceous period. It is named for the Jura mountains between France and Switzerland, which contain many rocks laid down during this period. At this time the supercontinent of Pangaea began to rotate and break apart, and the southern supercontinent of Gondwanaland also began to split.[1]

The period was characterised by a warmer and wetter climate than that of the preceding Triassic, and was dominated by dinosaurs. Notable Jurassic species included Stegosaurus, Allosaurus, Igaunodon, Hypsilophodon and huge sauropods such as Diplodocus, Brachiosaurus and Apatosaurus. The air was ruled by pterosaurs such as Dimetrodon and Rhamphorhynchus, and the first birds, such as Archaeopteryx, appeared during the period.

In the warm oceans, marine reptiles including plesiosaurs and ichthyosaurs were the top predators. The extinct cephalopod ammonites and belemnites were common.

Flowering plants had not yet evolved, and the dominant flora were conifers, ferns, horsetails and especially cycads, some of which grew to the size of modern trees.

Young earth creationist view

Young earth creationists believe that the evolutionary geological timescale is in error and do not believe in the Jurassic period.

References

  1. ↑ http://www.palaeos.com/Mesozoic/Jurassic/Jurassic.htm
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