FLY GEYSER
The multicoloured Fly Geyser in the Black Rock Desert of
Nevada, USA, is made from a mound of calcium carbonate
rock. Such mounds and pools are made naturally in many other places where springs gush out
warm, calcium-rich waters. The amazing colours of the rocks are caused by algae and bacteria
that live in this water.044-045_Fly_Geyser_Calcium_DPS.indd 44 02/12/16 6:52 pm