"Archilles' Heel" of Potassium-Argon and Argon-Argon "Dating" weis, "helium, neon and argon isotope systematics in kerguelen ultramafic xenoliths: implications for mantle source signatures," earth and planetary science letters, 138 (1996): pp. ar–ar dating is a similar technique which compares isotopic ratios from the same portion of the sample to avoid this problem.(2) "as a matter of practice, no radiogenic argon is supposed to have existed when the rock was formed.(5) "one of the main uses of potassium-argon in recent years has been in determining the ages of quite young samples, for example, those less than 60 million years old.. snelling, "discordant potassium-argon model and isochron 'ages' for cardenas basalt (middle proterozoic) and associated diabase of eastern grand canyon, arizona," in r.: in paragraph four of the above article, the numbers given for the five historic lava flows reflect the amounts of argon rather than the ages of the rocks listed in dalrymple’s paper “40ar/36ar analyses of historic lava flows. dating of grand canyon rocks: another devastating failure for long-age geology.
Reliability of Geologic Dating"the primary assumption upon which k-ar model-age dating is based assumes zero 40ar in the mineral phases of a rock when it solidifies. more than three decades potassium-argon (k-ar) and argon-argon (ar-ar) dating of rocks has been crucial in underpinning the billions of years for earth history claimed by evolutionists."excess argon": the "archilles' heel" of potassium-argon and argon-argon "dating" of volcanic rocks. these factors introduce error limits on the upper and lower bounds of dating, so that final determination of age is reliant on the environmental factors during formation, melting, and exposure to decreased pressure and/or open-air. with ar-ar dating, where excess argon can often be distinguished."excess argon": the "archilles' heel" of potassium-argon and argon-argon "dating" of volcanic rocks.-argon dating potassium-argon dating is the only viable technique for dating very old archaeological materials.