Sandstone is a type of sedimentary rock that consists of grains from 0.0625mm big to 2mm.
Coconino Sandstone refers to sandstones that are superiorly thick and pale colored. It was named after its exposure in Coconino County, Arizona. Grand Canyon is the most well-known place where people can easily find Coconino Sandstones. Being more specific, these Coconino Sandstones spread through Colorado Plateau, which covers Colorado, Arizona, Nevada, and Utah. The origin of Coconino Sandstone is the most debatable topic between creation geologists and evolutionary geologists. Evolutionists claim that Coconino Sandstone has been being formed throughout over 260 million years, which they call eolian process, while creationists think Coconino Sandstone as one of results of Noah’s Flood.
As the evolutionists disregard the biblical evidences, they are unable to understand that enormous amount of sand was moved in a short period. In order to explain the formation of Coconino Sandstone, they came up with ‘eolian process.’ What this theory says is that continuous wind has been moving sand little by little, over 260 million years. Evolutionists also use footprint fossils on the Coconino Sandstone to support their theory. Since those fossil footprints were assumed as trace of sand dunes or desert reptiles, eolian process, which is based on the assumption that Coconino Sandstone was formed under dry condition, could be supported.
Decade and couple more years ago, two young earth creationists Andrew A. Snelling and Steven A. Austin started asserting that Coconino Sandstone is an obvious geological formation that proves the truth of Noah’s Flood. They quoted Genesis 7:19, “They rose greatly on the earth, and all the high mountains under the entire heavens were covered,” and pointed out Grand Canyon as one of the results of Noah’s Flood. This theory is also supported by fossil records that are found in Coconino Sandstone. Many fossils of aquatic organisms were found within Coconino Sandstone, not just bottom part, which means Coconino Sandstone and Grand Canyon were formed under water.