Grand Canyon's secret for 55 million years

Grand CanyonIs a valley in the state of Arizona in the USA and is well described as the terrain cut by the eroding action of the Colorado River .... It seems that it seems that it seems that it does not seem to be so.

The secret of the unknown Grand Canyon from the latest research results is from the following.
Grand Canyon's 55-million-year-old secret: Nature News

It was a general theory that it was shaved by the Colorado River six million years ago, but according to a new research it is actually based on what was shaved out by a river flowing in the opposite direction 55 million years ago It seems that it turned into a shape like now. It turned out by investigating the part made of the granite in the upper part of the canyon, and the old part below 1000 meters is located in the topography extending to about one-third of the eastern part of the Grand Canyon It seems that there is a possibility that it is getting. It seems that it was cut by the Colorado River since this original topography was formed.

This "old river" which is not found this time is scheduled to be announced by Rebecca Flowers of the University of Colorado in the May issue of the Geological Society of the University, and according to it, among rock samples containing mineral apatite , As a result of using a relatively new dating method to examine the levels of uranium and helium isotopes, it seems that these facts are known. Indeed it was quite surprising that geologist California Institute of Technology geologist Mr. Brian Wernicke, co-author of the conference, had a totally different result than the conventional theory, so it seems that he could not believe the result.

You can see the aerial photograph of what happens when we look at the Grand Canyon from above from the link below.

Grand Canyon - Google Maps