Sand Tufa-Mono Lake-California
I was first shown these sand tufas by David Gaines and Sally Judy in 1978 when I spent an amazing night with them camped on the shores of Mono Lake. This photo and others are from when I revisited them again in 2008.
They are formed when calcium rich fresh water from springs under the lake reacts with the lake water rich in carbonates and forms calcium carbonate or limestone. These are calcium carbonate tubes that have been exposed when the sand surrounding them has eroded. Reminds me of some of the illustrations on early Yes Albums.
Photo-a-Day 1/8/2012 Bill Stone
see more at: http://bill-stone-and-daughter.smugmug.com/MonoLake-1
naturegeologytufasand tufamono lake