The formation process and causes of decorative gravels，pebble

Pebble formation process can be divided into two stages. The first stage is the weathering of rocks, decorative gravels ,landslides stage; the second stage is a rock in the river by river transport and the grinding stage.

Containing pebbles of gravel, which was caused by broken rock, only long distance transport away the edges and corners, forming a circular or oval stones (or pebbles, gravel), decorative aggregate , then the cementation of rock known as the gravel.