1. Its waters show a permanent stratification due to a natural geological phenomenon . 2. Monument Valley is a geological phenomenon in southeastern Utah. 3. "The Splits are a geological phenomenon . 4. They are unlike any terrestrial geological phenomenon . 5. It's called Volcanoes Online and features all kinds of information about this geological phenomenon . 6. Andrews and the others were skeptical, thinking they would prove to be some geological phenomenon . 7. Puddingstone Road in Johnson Township was named for the geological phenomenon of St . Joseph Island. 8. Symbolism also attributes that evolution from water could relate to the geological phenomenon of the tectonic age. 9. 9 . Which geological phenomenon was designated the United States'first national monument by Teddy Roosevelt in 1906? 10. The terroir of Chambertin is legendary for its exceptional richness due to a geological phenomenon called " alluvial fan.