https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png00Geology Picshttps://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.pngGeology Pics2022-09-19 23:12:132022-10-04 03:46:40Edge of Ash bed in Oligocene-Miocene sandstone, Nebraska
