Sheet-type single-storied channel sandstones are also found, the lower portion of the biozone often containing fining upward sequences. Calcium carbonate precipitation crusts and gypsum “desert rose” crystals have been uncovered in the sandstone layers.
Sheet-type single-storied channel sandstones are also present in the rock formations. The lower portion of the biozone often shows a fining upward sequence, which is typical for sedimentary deposits. Calcium carbonate crusts and gypsum crystals resembling "desert rose" have been found within these sandstone layers.