How can limestone and sandstone be identified with the naked eye?
The simple point is limestone is dense, looks is a piece, mostly gray sandstone; as the name implies, closer, closer look, is a small sand cemented together, touch them, rough sense.
This is still relatively good, especially in the experimental class of petrology, it should not be difficult.
Coarse grain of sandstoneDue to the weathering of limestone prone to weathering stripesThe main mineral dolomite calcite etc. if the local water is easy to produce karst
