Ash bed in sandstone, Arikaree Group, NebraskaSeptember 19, 2022/in /by Geology Pics volcanic, interbedded, ash fall https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png 0 0 Geology Pics https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png Geology Pics2022-09-19 23:11:182022-09-19 23:41:36Ash bed in sandstone, Arikaree Group, Nebraska
