Surface deposit
Nick said:
>In fact, given the extensive layering and hints of cross bedding and
>undulose bedding, it's hard to imagine formation in the subsurface.
>This *is* a surface deposit.
Nick, do you believe this is a surface deposit in that it was initially deposited
as a volcanic ash and then sulfuric acid latter modified it. --or-- That this
sulfate material was deposited in the bottom of a standing body of water.
Gary