Paving Blocks

a stone road-building material in the form of blocks of solid rock (granite, diabase, or basalt) having a form close to that of a parallelepiped. Dimensions (in cm): length, 15-30; width, 9-15; height, 10-16. Paving blocks are manufactured by cleavage on rock-splitting machines, with subsequent trimming of planes and edges. They are sometimes used for applying a covering to more heavily traveled portions of automobile roads and for paving city streets and squares (for example, Red Square in Moscow).