When they mysteriously disappeared from the Southwest some 700 years ago, Anasazi Indians left behind intricate ruins and painted or pecked designs on rock as powerful testimony to their civilization. The desert also preserved a more fragile reminder - sandals woven from yucca leaves, in which the footprints of the wearers are clearly visible. Approximately 325 of these sandals collected during 54 years of archaeological investigation will be on display at the Utah Museum of Natural History, April 22 through Oct. 22. Treading in the Past: Sandals of the Anasazi will explore the methods of the sandal makers as well as those used by archaeologists to discover and collect the footwear. A catalog of the exhibit with over 300 color photos is available through the Museum bookstore for $29.95. For more information, contact the Utah Museum of Natural History, 215 South 1350 East, University of Utah, Salt Lake City, UT 84112 (801/581-4303).