The Rocks
 

There are only three different rocks represented at Meteor Crater. Just under the topsoil is the dark reddish brown Moenkopi sandstone. Below the Moenkopi are the yellow and orange layers of the Kaibab limestone. For several hundred feet below the Kaibab limestone there is only the Coconino sandstone. It is this grayish rock which is seen making up most of the crater walls. It is the pulverized Coconino which is white that was dug up in the first shafts. Piles of this white silica are very obvious on the crater floor still today.