Ash flow tuff, ColoradoDecember 31, 2017/in /by Marli Miller ignimbrite, volcanic, pyroclastic https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png Marli Miller2017-12-31 11:39:082017-12-31 11:47:18Ash flow tuff, Colorado
