Mineral ribbons in deposits of volcanic ash ?
Geologists and mineralogists
now have another mystery to solve. Bright ribbon-like inclusions are found
in boulders at the base of the delta scarp. Such bands can be seen in the
laminated ash deposits as well as in lava-like boulders. It is premature to
claim that it is Gypsum. That would be a sensation and would mean that it
is an evaporite that is formed on Earth with the participation of water.
Bright ribbon in lava ? or ash