Q. What is the origin of white pebbles?

Answer

According to the Udden-Wentworth scale used in sedimentology, a pebble is a clast of rock that has a particle size ranging from 4 to 64 millimetres. Granules are often believed to have a lower diameter than pebbles, which are in turn considered to have a smaller diameter than cobbles. The word "conglomerate" refers to any kind of rock that is mostly composed of pebbles. Pebble tools are among the first known objects that were manufactured by man. They date back to the Palaeolithic epoch in the history of humanity.