Clastic rock
Clastic rocks are sedimentary rocks that form when rock fragments are squeezed together under high pressure. Clastic rocks are grouped according to the size of the rock fragments or particles that they are made of. Some fragments are too small to be seen with even a microscope. Some fragments can also be large boulders that are too heavy for you to pick up. Some examples of clastic rocks are...Shale, Conglomerate, and Sandstone.