Alteration and change are constantly occurring in the thermal basins and add to the mystery of this fascinating land. They bring not destruction and loss, but rather new birth and gain. Who knows what interesting ornate new features may develop by next year, or in five years. You are encouraged to return again and again to enjoy this ever-changing scene. For your safety and the protection of the fragile features, PLEASE STAY ON THE TRAILS. Pets are not permitted on the trails, for their protection and yours. _EMERGENCY PHONE 344-7381_ [Illustration: _MAMMOTH HOT SPRINGS AREA_ YELLOWSTONE NATIONAL PARK] WHITE ELEPHANT BACK TERRACE BATH LAKE ORANGE SPRING MOUND NEW HIGHLAND SPRING ANGEL TERRACE CUPID SPRING LOWER TERRACE OVERLOOK NEW BLUE SPRINGS CANARY SPRINGS JUPITER SPRINGS MINERVA SPRING PALETTE SPRING OPAL TERRACE CAVERN SPRINGS RESERVOIR SPRINGS LIBERTY CAP (ONE WAY) NO TRAILERS OR BUSSES NORRIS 21 MILES TRAILS IN RED PICNIC TABLES BEAVER PONDS TRAIL (6 mile loop) PHOTO SHOP SERVICE STATION GENERAL STORE PHONE RESTAURANT MAMMOTH MOTOR INN AND CABINS VISITOR CENTER CHAPEL TOWER ROOSEVELT 18 MILES HORSE RENTAL OLD ROAD TO GARDINER (ONE WAY, GRAVEL) ICE VENDOR POST OFFICE CLINIC ADMIN. BLDG. CAMPGROUND PHONE NORTH ENTRANCE 5 MILES Water falling on areas south of Mammoth Hot Springs seeps into limestone strata. water + carbon dioxide → mild carbonic acid; this dissolves limestone Carbon dioxide gas rises from magma. magma Hot mineral springs flow from cracks. fault zone Gas (mainly carbon dioxide) escapes—limestone (travertine) forms Board walk The Yellowstone Association [Illustration: NATIONAL PARK SERVICE • Department of the Interior] This guide was published for your use by The Yellowstone Association for Natural Science, History & Education, Inc. in cooperation with the National Park Service, U.S. Department of the Interior. The Yellowstone Association is a non-profit organization dedicated to service to the park and its visitors. Your donation will be used for this purpose. For information about other pamphlets, books, and maps pertaining to Yellowstone National Park or Association membership and educational activities, write to P.O. Box 117, Yellowstone National Park, Wyoming 82190. printed on recycled paper Transcriber’s Notes —Silently corrected a few typos. —Retained publication information from the printed edition: this eBook is public-domain in the country of publication. —In the text versions only, text in italics is delimited by _underscores_.