Where are obsidian dating labs
K–Ar dating is part of Wiki Project Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource.If you would like to participate, you can choose to edit this article, or visit the project page for more information.Could somebody having a copy of Harrison and Mc Dougall check?The following currently is on another wikipage, but I think it ought to be here instead.Alisyd , 18 April 2006 (UTC) Standard creationist boilerplate is not appreciated and not helpful.Of course there are ::assumptions involved in K/Ar dating.Every radiometric dating technique relies upon similar ::assumptions--the point is that they're justified assumptions.A few seconds of googling will ::show you various sites that confirm that decay rates are constant and remain so. Finally, can we please stop using the "you weren't there! I wasn't there for your ::mother's birth, either, but I can infer that she was indeed born from the fact of your existence.
Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite.Other types with dark bands or mottling in gray, green, or yellow are also known.rhyolitic lavas may contain up to 10 percent water, which helps to keep them fluid even at a low temperature.