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<br />/~ <br />~n~noun~a~n~o~~, <br />MAP UNIT NOTFS <br />MU 1 - Ustic Torriorthents -Rock outcrop complex, 30 to 70 percent <br />slopes. Map unit occurs on steep sideslopes of upland ridges <br />and benches. Torriothents are dominantly shallow to shale, <br />although lithic and moderately deep soils occur. Mapped at <br />the subgroup level due to heterogeneity of soil types. Not <br />sampled due to shallow depth to rock, clayey textures, and <br />steep slopes. Rock outcrop consists primarily of shale with <br />some Dakota sandstone. <br />M U 2 - Nihill stony loam, 25 to 70% slopes. Map unit occurs on steep <br />sideslopes of fans. Soil formed in alluvium high in rock frag- <br />ments derived from sedimentary rocks. Inclusions are 5% non- <br />skeletal soils and 5% moderately deep soils. Not sampled due <br />to high amou nts of rock fragments on the surface and throughout <br />the profile. Roadcuts near dam site a re representative of this unit. <br />MU 3 - Ascalon loam, 6 to 20% slopes. Map unit occurs on crests and <br />sidelopes of fans. Soil Cormed in alluvium and eolian materiels <br />from sedimentary rocks. Inclusions are 5% soils with very cobbly <br />substratums and small areas with slopes up to 50%. Soil sampled <br />at stop N15; topsoil stripping depth 5'+, except for areas with <br />cobbly substratum, then 3' depth. <br />MU 4 - Irock stony loam, 6 to 20% slopes. Map unit occurs on crests <br />• and sideslopes of fans. -Soil formed in alluvium high in rock <br />fragments derived from mixed sedimentary rocks. Inclusions are <br />5% soils with a clayey~keletal control section and small areas <br />of Ascalon soils. Not sampled due to high amounts of large <br />rock fragments on the surface and throughout the profile. <br />