Hough. With humor and ease, geologist Susan Hough leads you to the state's most accessible and active faults, telling the stories behind the major temblors that have shaken the region. Includes GPS coordinates, photographs, and maps.

Casanova & Ratkevich. Locations of fossils in the U.S., cataloging, and preserving.

#240-447; AN ILLUSTRATED GUIDE TO FOSSIL COLLECTING, (240 PAGES), SHP  WT.8 OZS.; $9.95

Comfort. For those seeking natural collectibles in the sunshine state, geologic surprises abound. Minerals and fossils are in abundance. Quarry cuts and off shore coral forests showcase the state's treasures. Explore collecting sites across the state. Includes maps, color photos, and extensive information on clubs, museums.

Ream. Revised and updated. Over 36 localities where plume agate, garnet, opal, petrified wood, topaz and other gems and minerals can be found. Maps and photos.

Voynick. The "Bible" of Colorado Rock hounds. Covers more than 350 collecting sites, with an overview of the state's geologic origins and mining history. County-by-county guide illustrated with maps and B/W photos.

Bearce. The complete guide for both novice rock hounds and experienced mineral collectors with new and exciting collecting sites that exist and are accessible. Includes topographical maps, full color and B/W photos, and site difficulty scales.

Lambert. Excellent basic reference to the ingredients and processes that forged our planet. Diagrams, maps, and photos. 256 pages.

Brown, Allan, Stark. Revised edition. Illustrations, color photos, and maps make this a handy reference book. Also provides listing of minerals along with the US maps on which they can be found.