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Then last episodes of David Attenboroughs Planet Earth was dedicated to this AMAZING most spectacular set of caves .....
Quote from: neilep on 07/10/2007 08:07:37Then last episodes of David Attenboroughs Planet Earth was dedicated to this AMAZING most spectacular set of caves .....ooops! Then I must <<rewind>> and get back to those. Can't believe I've missed that!Thanks a lot for that info and pointer 
However, this I am sure is the beginning of the program long before the crystal cave part !!..*le sigh* http://youtube.com/watch?v=U6wRk813QoQ
Geological Society of America's journal Geology (April) printed an article on these giant crystals. Abstract is available at http://www.gsajournals.org/perlserv/?request=get-abstract&doi=10.1130%2FG23393A.1According to the authors, these crystals could only form under very specific conditions- they had to grow in a saturated solution at the gypsum-anhydrite phase transition, which is slightly below 58 degrees C. If either the temperature or the level of saturation vary much over time, new nucleation (new crystals) form instead of the immense crystals found. Estimated time to form these crystals ranges from thousands to millions of years.[attachment=1236]cover photo on April volume of Geology