Isochron radiometric dating wikipedia
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Nearly all geologists understand these layers to have been deposited over the course of hundreds of millions of years.This essay starts with a tour of the Grand Canyon, noting evidence that shows the Canyon rocks are indeed very old.
This deep gash in the earth provides a window into the geological past.There is a cadre of YE creationists with scientific credentials who publish articles which claim that mainstream science is mistaken on matters such as the age of the earth.As a window into current YE creationist thinking on the subject, we use a recent (September 11, 2010) article in WORLD magazine.An alternate point of view is Young Earth (YE) Creationism.YE creationists hold to a literal interpretation of the Bible, which does not adequately take into account the intent of the Scriptures or the historical circumstances of their authorship.WORLD is a biweekly news magazine with a Christian perspective.
The author of this article, Marvin Olasky, accompanied 5 YE creationists on a rafting trip on the Colorado River through the Grand Canyon, and relays their views on the geological features.A schematic of the rock layers is shown above [from 1992 article by Andrew Snelling with answersingenesis.org].The lowermost layer shown is the Vishnu Complex, consisting of rocks that have been deeply buried, heated, and transformed (metamorphosed).The flats on either side are mainly the Tapeats Sandstone layer, with a gray slope of soft Bright Angel Shale showing at upper right.Note the side canyons coming in at roughly right angles to the main Canyon.Atop that are a series of mainly sedimentary layers (Bass Limestone, Hakatai Shale, etc), along with the igneous Cardenas basalt.