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Popular Dating Methods Both the K-Ar and Rb-Sr methods make use of radioactive decay of a parent isotope to a stable daughter isotope. Leeman, "Late Cenozoic Alkali-Rich Basalt from the Western Grand Canyon Area, Utah and Arizona: Isotopic Composition of Strontium," Geological Society of America Bulletin, 85 (Nov. Six analyses of Uinkaret Plateau basalts (U-33, U-35, U-59, U-24, U-43, U-58) were used. Potassium-40 (Rb has occurred since the rock cooled from the lava flow.
AJthough the lavas flowed over the rim and into the Grand Canyon, the "isochron" age of 1500 million years would make these youngest lava flows among the oldest rocks yet dated in the Grand Canyon.
If Scripture is inaccurate in this, then how can it be trusted in anything else?
Some evolutionists throw out theistic evolution (God using evolution as His creative process) as a philosophical panacea, with the goal of leading people to conclude that Genesis is a myth.
These flows came from volcanoes on the Ulnkaret Plateau north of the Colorado River.
Some of the lava flowed over the north rim, cascading into Grand Canyon, forming spectacular "frozen" lava falls.