Add Yahoo as a preferred source to see more of our stories on Google. While landscaping brings greenery to many people’s minds, rocks are an important part of landscaping, too. Perhaps more accurately ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Talc - Gypsum - Calcite - Fluorite - Apatite ...

After the tragic premature death of George Huntington Williams in 1894, the attempt by four young American petrographers to collaborate on construction of a quantitative classification of igneous ...