Learn about how rocks and formed as well as how to identify the basic types of rocks with the DK 'What's that Rock or Mineral' beginner's guide. This slim, pocket-sized volume covers rocks by grain-type; entries include a full-color picture along with a description. A Rock Gallery section displays the rocks profiled in the book, grouped by igneous, sedimentary, or metamorphic type, and arranged by grain size; a gallery of minerals follow. 128 pages, softcover. 4' x 7.5'.
