Sand is a very common unconsolidated sedimentary rock, with its particle size varying between 0.063 and 2.0 mm. It also has an extremely variable mineral composition. Many types contain quartz or ...

"Probably the most common composition would be quartz sand with some feldspar," said Williams. This mineral formula gives beaches that sort of typically, well, "beachy" complexion of a light brown ...

Summer wouldn't be complete without a trip to the sandy shores of an ocean, bay, lake or river. As the gritty stuff gets in between your toes, you may wonder why beaches are distinctive sandy ...