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These same assumptions also apply to the 40Ar/39Ar method, although this latter technique provides greatly increased opportunities for their testing.

The principal assumptions are given below with brief comment as to their validity, and will be further discussed implicitly or explicitly in the following chapters."1.

K–Ar dating is part of Wiki Project Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource.

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This article is within the scope of Wiki Project Archaeology, a collaborative effort to improve the coverage of Archaeology on Wikipedia.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.Microlites (tiny polarizing crystals) of feldspar and phenocrysts (large, well-formed crystals) of quartz may also be present.Most obsidian is associated with volcanic rocks and forms the upper portion of rhyolitic lava flows.

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