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<br />"'..8.'" <br /> <br />information is contained in, "Ghost Towns of the Colorado Rockies" by <br /> <br />R. L. Brown (Caxton Printers, Ltd., 1969); "Crystal River Saga" by <br /> <br />Teresa V. Francis (private printing, 1969); and "History of Marble, <br /> <br />Colorado" by Ruby Isler (Reminder Publishing Co., 1964). Additional <br />historical information was gained by conversations with long-time <br /> <br />residents of the area. <br /> <br />ACKNOWLEDGMENTS <br /> <br />Land owners of the area were very courteous in giving us free use <br /> <br /> <br />of trails, furnishing gate keys and other details which aided our field <br /> <br /> <br />studies of the area. The U.S. Ceo logical Survey lent us two sets of <br /> <br /> <br />aerial photographs, and Mr. Peter Wingle of the U.S. Forest Service <br /> <br />lent us his set of low altitude oblique photographs of the Marble area. <br /> <br />DESCRIPTION OF AREAS OF POTENTIAL GEOLOGIC HAZARD <br />Introduction <br />Major areas of known or suepected geologic hazard are listed and <br />described below and shown on plate l~ The number in parentheses after <br /> <br />each topic indicates the corresponding index number on plate 1. Some <br /> <br />of the features mapped and discussed are based primarily on photogeologic <br /> <br />studies, but nearly all were field checked by reconnaissance methods. <br /> <br />In describing these potential hazard areas, our intent is to bring <br /> <br />attention to factors which we believe will have a significant impact on <br /> <br />area development. Some impacts will be essentially economic - involving <br /> <br />the cost of designing and implementing engineering solutions to unfavor- <br /> <br />able geologic conditions vs. the potential value of the land reclaimed. <br /> <br />Other possible impacts involve situations in which engineering solutions <br /> <br />or general construction activities attending development could affect <br />