Rhyolite dike intruding tuff, Oregon June 17, 2020/in /by Marli Miller Miocene, pyroclastic https://geologypics.com/wp-content/uploads/2017/07/geology-pics.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/07/geology-pics.png Marli Miller2020-06-17 08:46:562020-06-17 08:53:48Rhyolite dike intruding tuff, Oregon