by Teresa » May 24, 2008 10:24 am
That photo, I believe, is the Angel's Shower at Ozark Caverns State Park, near Lake of the Ozarks Missouri. It is an otherwise unremarkable show cave, but that one speleothem is special.
An alternate to the tree root explanation is that the water is coming through a set of parallel fractures along a joint. Instead of having just one crack as a cave former, the ceiling has a close set series of vertical cracks emitting water, and laying down calcite side by side, forming a shower instead of a cascade.