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11111 Whetstone <br /> 4 <br /> Associates Technical Memorandum <br /> Table 1. Stratigraphlc Units In the Vicinity of the JD-8 Mine <br /> System Stratigraphic Unit Thickness Physical('haracteristics <br /> (feet) <br /> Alluvial sands and gravels.loess,colluvium. <br /> Quaternary Alluvium 0- 100 windblown sands <br /> Upper Cretaceous Mancos Shale 1.000-5,000 Shales interbedded with minor sandstone <br /> Lower Cretaceous Dakota Sandstone 0-200 Fine to coarse-grained cross-bedded sandstone <br /> Burro Canyon Formation 0-250 Conglomerate,sandstone and shale <br /> i>i .9 Brushy Basin Member 400-500 Shales interbedded with minor sandstone <br /> tipper Jurrasic .o I Medium-grained sandstone interbedded with red <br /> 2 ci Saltwash Member 300 shale <br /> Summerville Formation 0- 120 Shales interbedded with minor sandstones <br /> Entrada Sandstone 15- 170 Butt'to grayish-white cross-bedded sandstones <br /> Siltstone and mudstonc interbedded with fine- <br /> Upper and Middle Carmel Formation 0-40 <br /> Jurassic grained sandstone <br /> Navajo Sandstone 0- 125 Fine-grained,cross-bedded quartz sandstone _ <br /> Kavcnta Formation 0-200 Sandstone interbedded with siltstone and thin- <br /> bedded shale <br /> IN" r A A.. <br /> T <br /> t _ <br /> - Y <br /> Me ... wx.__ <br /> IMO--.3 .....0111011:2:1112111.11.1. ..4niitaa./... aM1.1. <br /> t <br /> .M_ ...aw,.,w <br /> Rl00 f..µ..N <br /> u.l-•.w <br /> M-fA4[rY <br /> W1Y tf <br /> • <br /> Figure 1. Stratigraphlc Cross Section of JD-8 Mine Site(White, 2006) <br /> SO <br /> 4122A.120413 2 <br />