Pebbles is formed?

Around 100 million years ago in the Mesozoic, in the role of crustal movement of magma out the surface, rapidly cooled lava will form granite. Thereafter dating back thousands of years, due to the dislocation of granite magma intrusion caused by extrusion, resulting in a large number of smaller stones, those stones at the water's edge, after a long period of slow water erosion and their mutual rolling, forming today's stone factory.
   
      Pebble is a very long time, gradually formed.

      Due to crustal movement and other forces of nature weathering shock, and then after flash floods impact,stone for building water handling and gravel repeatedly between rolling friction, and finally formed a lovely rounded shape pebbles. Rivers flowing through different geological structure, there are different mountain rocks, through erosion, it will form a cobblestone different components. Rocks on the mountain due to the weathering avalanche down in the erosion process in the river, by the action of water transport and want mutual rounded, forming a pebble. http://www.stonegroupon.com/

      Then hard stone, washed in the river, slowly becomes smooth, until natural, smooth as eggs.

      Pebbles forming process can be divided into two phases, the first rock weathering, collapse stage; the second stage is the rock in the river by river transport and rounded stage.

      Containing gravel pebbles inside, its causes are broken rock, only long-distance transport to make the edges disappear, forming a circular or oval stone (or gravel, gravel), and then by cementation of rock called gravel.

      Sand, gravel, eroded limestone, cobblestone, Melaleuca stone, etc., color: red cream, green butter, wide red, coffee, Chinese Emperador, black white, cream thread, hang gray, yellow travertine, beige travertine, green Bao, Dandong, and large green flower green, rice topaz, citrine, rain red, white marble, Moyu, Jin Xiangyu like.

      It turned out to be thick and large rocks, but after millions of years of erosion and rainwater collide between each other, has become a piece of carved beautiful pebble.