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Lumsden Canyon Gravel Pit <br />' SS :. Sw Section 16, T.S1N., R.19w. <br />New Mexico Principal Meridian <br />' The Lumsden Canyon Pit is located west of Gateway, Colorado. <br />The pit is easily accessible by }Iighway 141. According to <br />the.reierence material reviewe some pits in this general <br />area were used t>y the State H,iway Department in the 1950s. <br />The Mesa County Pit we observed is located in an alluvial <br />' fan containing a. heterogeneous mixture of coarse sand and <br />t sandstone fragments derived from the Precambrian, Triasic, <br />and Jurassic formations. <br /> Well-rounded and sorted gravels of the Dolores River origin <br />' is exposed on the deeply disected lower edges of some fans. <br /> The Dolores River flowed past the lower edges of these fans, <br /> actaally truncated them, and reworked the fan gravel with its <br /> owa river gravel. <br />' The euality of these resources is variable at best. Overall, <br />' the gravels observed by this writer would not pass minimum <br />rec~ni~ed tests for hardness or freeze/thaw characteristics. <br />If the gravels could not pass these basic tests, the material <br />would not be suitable for concrete, asphalt, or basecourse <br />aggregate. <br />The_agaregate could be used for the stabilization of low <br />tra~iic, unpaved type roads. <br />The quan=ity of 'the pits is approximately 398,775 cubic yards. <br />' This quantity was not verified by depth checks by drilling <br />methocs_ <br /> <br />Mineral Resource: Survey of Mesa County - A Model Study; <br />Resource Series :?; Stephen D_ Schwochow; 1978 <br />' United States Geological Society writings <br />Various United States Geological Society Maps <br /> <br /> <br />1 <br /> <br />