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Dictionary » Z » Zircon

Zircon

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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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: 44
Views: 1045

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: 411

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: 2378

Re: argument against the uranium-in-zircon dating

Explain how so; it makes perfect sense to me. Fact: Writing was first developed about 4,000 years ago. Fact: That is when written history begins. Strange coincidence, wouldn't you say? Almost your best answer yet... you may want to think on that one some more.

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by js2008
Tue Dec 09, 2008 11:32 pm
 
Forum: Evolution
Topic: argument against the uranium-in-zircon dating
Replies: 17
Views: 2378

Re: argument against the uranium-in-zircon dating

It's called the modern synthesis. Look it up. Based on lies, half truths and not very well thought out assumptions.

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by js2008
Tue Dec 09, 2008 11:31 pm
 
Forum: Evolution
Topic: argument against the uranium-in-zircon dating
Replies: 17
Views: 2378
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