Geological description of tuffaceous siltstone
Tuffaceous sandstone: sand is fine sand, the composition is mainly quartz, feldspar secondary, separation medium, sub round, tuffaceous cement, dense, and hydrochloric acid does not respond
Fluorescent dry, according to no display, series contrast 4
Tuffaceous siltstone: tuffaceous cement that is dense and does not react with hydrochloric acid
