Eons are split into smaller units called Eras which last several hundreds of millions of years.Eras are split into smaller again units known as Periods which are again split into smaller units called Epochs which are finally split into separate Ages.
It is generally held by the scientific community that the Grand Canyon formed by the slow erosion of the Colorado River over millions of years. Steve Austin, however, has proposed an entirely different theory on the age and formation of the canyon and wrote a book explaining his theories titled Grand Canyon: Monument to Catastrophe. Austin believes that the canyon was formed extremely rapidly during the period immediately following the global flood of Noah in the biblical book of Genesis. Austin proposed that the canyon is thousands, not millions of years old.When asked to imagine the biggest, deepest, longest canyon one can imagine, an image of the Grand Canyon will often pop into a person's mind.The Grand Canyon is a site of almost unfathomable grandeur, which inspires awe in anyone who sees it.Krypton is a noble gas that is present in the atmosphere at extremely low levels, or about one part per million.In the upper atmosphere, exposure to cosmic rays can transform a stable krypton isotope into a slow-decaying radioactive isotope.
The scale is split into different units; the biggest unit is the Supereon which is made up of Eons.