After the recrystallization of magma, more 40 K will decay and 40 Ar will again accumulate, along with the entrained argon atoms, trapped in the mineral crystals. No daughter or parent product has entered the sample since then. The long half-life of 40 K allows the method to be used to calculate the absolute age of samples older than a few thousand years. Here are the original claims behind the Ngauruhoe volcanic rocks from the Institute for Creation Research. Our goal is to provide rebuttals to the bad science behind young earth creationism, and honor God by properly presenting His creation.
In rubidium-strontium dating, micas exclude strontium when they form but accept much rubidium.
Some of the common mistakes we make in evaluating claims are resisting contrary evidence, looking for confirming evidence, and preferring available evidence. Of the 26 lava flows that were sampled and analyzed, 18 of them gave expected results. Your exact question is on page C As all new radiometric dating methods are calibrated using dates from existing methods, any based directly or indirectly on the potassium-argon method should not be used to calculate the ages of rocks. More About Potassium-argon dating 5 references found in Britannica articles Assorted References major reference In dating: Creationists often use very old data to prove their point! Lassen, and Sunset Crater samples as their apparent K-Ar dates!!