Oligocene volcanic rocks are located in far west Texas in the large Bend area. A blanket of Miocene sediments called the Ogallala development in the western significant plains area is a vital aquifer.[164] Situated much from an active plate tectonic boundary, Texas has no volcanoes and couple of earthquakes.[165] dispatch.com https://www.highrevenuenetwork.com/dv3budnw?key=cca7eafa5b3220b0530a18e061dc648d