www.monolake.org/about/geotufa http://www.monolake.org/about/geotufa http://www.monolake.org/about/geotufa Tufa Towers: Mono's Magnificent Monuments "tufa towers" http://www.monolake.org/about/geotufa "tufa towers" Mono Lake Committee: "Tufa" tufa towers "tufa towers" Mono Lake monolake.org "Tufa Towers: Mono's Magnificent Monuments" "tufa towers" tufa towers Mono Lake Committee: "Tufa" Mono Lake Committee "tufa towers" "tufa towers" calcium carbonate (limestone) spires source http://www.monolake.org/about/geotufa Tufa source tufa towers Mono Lake Committee: "Tufa" towers of limestone "tufa towers" "tufa towers"