Some interesting facts about sandstone are that it is composed of cemented sand and therefore is a type of sedimentary rock; it has one of the larger particles of all the rock types; and it is used for building, paving, construction and glass making. Sandstone forms where sand is laid down and buried. One famous example of this is the red rock formations of the Grand Canyon in Arizona.
Sandstone is sand that has been cemented together by two other elements: matrix, which is a fine-grained material that comes mixed with the sand, and mineral matter, which acts as the cement that binds the matrix and sand into rock. When the sand mixture is buried deep under the Earth's surface, the pressure of burial and slightly higher temperatures cause the minerals to dissolve or deform. The grains then become more tightly knit together, and the sediments are squeezed into a smaller volume. This process usually happens offshore from river deltas, but desert dunes and beaches can also create sandstone beds.
In rock classifications, sandstone has medium-to-large particles. The particles usually measure between 1/16 millimeter and 2 millimeters, which is one of the larger particle sizes for rocks in the sandstone/mud stone rock categories.