Daily Archives: March 14, 2008

Sandstone rocks are sedimentary rocks made from small grains of the minerals quartz and feldspar. They often form in layers as seen in this picture. They are often used as building stones. Advertisements

For thousands, even millions of years, little pieces of our earth have been eroded–broken down and worn away by wind and water. These little bits of our earth are washed downstream where they settle to the bottom of the rivers, … Continue reading →