The size of the particles (0.07 centimeters) tells us that this is a sandstone. Here's why:
* Sandstone is formed from sand-sized particles, which range from 0.0625 to 2 millimeters in diameter.
* Smaller particles (less than 0.0625 millimeters) form mudstone or shale.
* Larger particles (greater than 2 millimeters) form conglomerate or breccia.
Therefore, the rock formed by the compaction and cementation of particles 0.07 centimeters in diameter is sandstone.
