Our Geological Wonderland: Quail Lake and the Virgin Anticline Our story begins with a geologic disaster. Just after midnight on January 1, 1989, a dike holding back water in Quail Lake, a reservoir for St. George, failed, producing one of the largest historical floods in the Virgin River. Damage to various structures and roads totaled … Continue reading Our Geological Wonderland: Quail Lake and the Virgin Anticline