Dictionary » Z » Zircon



(Science: chemical) A mineral occurring in tetragonal crystals, usually of a brown or gray colour. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colourless, pale-yellow or smoky-brown varieties from Ceylon are called jargon. Zircon syenite, a coarse-grained syenite containing zircon crystals and often also elaeolite. It is largely developed in southern Norway.

Origin: F, the same word as jargon. See Jargon a variety of zircon.

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How to estimate accurate age of earth

http://en.wikipedia.org/wiki/Age_of_the_Earth#cite_note-nature409-4 The oldest such minerals analyzed to date – small crystals of zircon from the Jack Hills of Western Australia – are at least 4.404 billion years old http://www.ncbi.nlm.nih.gov/pubmed/11196637 Plug in some assumptions which ...

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by jinx25
Tue Oct 30, 2012 3:03 pm
Forum: General Discussion
Topic: How to estimate accurate age of earth
Replies: 2
Views: 1974

Re: Theories - Origin of Life

... these crystals tell a fascinating story about how far back in Earth’s past the oceans might have formed. http://earthobservatory.nasa.gov/Features/Zircon/ http://earthobservatory.nasa.gov/Features/Zircon/zircon2.php So the evidence from the US government agencies is painting a picture of an early ...

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by scottie
Fri Oct 21, 2011 7:34 pm
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1138530

Re: Bird-Dinosaur News

... Helium is a by-product of uranium decay. Helium is so small it much of the helium would diffuse while nuclear decay continues. Research done on zircon crystals inside "1.5 billion an" granite in New Mexico found alot of helium when heated. The diffusion data matched assumed 6000 years ...

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by AFJ
Wed Jul 08, 2009 2:51 am
Forum: Evolution
Topic: Bird-Dinosaur News
Replies: 46
Views: 59385

Re: Radiometric dating of rocks

... are a few things to consider, if it is a clay pot, it has not been changed. With certain elements in the clay pot, they leave a time marker, as in zircon or other minerals. As time passes these minerals decay and leave different elements behind. This decay has been formulated with math. Half lives ...

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by MichaelXY
Wed Jun 03, 2009 8:15 am
Forum: General Discussion
Topic: Radiometric dating of rocks
Replies: 2
Views: 5810

Re: argument against the uranium-in-zircon dating

Who is "they"?? And how does what "they" say make it a simple way of knowing that?? Sounds like that is how you define all your beliefs... by what "they" say. Do some critical thinking young man. The Answers in Genesis website, dude, the very group who wrote the articl...

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by alextemplet
Wed Dec 10, 2008 2:19 am
Forum: Evolution
Topic: argument against the uranium-in-zircon dating
Replies: 17
Views: 13871
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