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<br />logs obtained during previous studies of the subject areas to <br />provide insight as to subsurface conditions at depths beyond <br />the reach of test pits. <br />A-3 GEOPRORPHIC UNITS <br />The areas of our study were divided into several ¢eomor- <br />phic units (physiographic units) that are characterized by <br />identical geologic and morphologic conditions. In particular, <br />attention was paid to the units that belong to alluvial val- <br />leys; mapping has been performed in less detail in qualifying <br />the geomorphic units of the upland outside the alluvial val- <br />ley. <br />Individual geomorphic units are described below. <br /> <br />• <br />Plan-made cuts and fills have been constructed in connec- <br />----------------------- <br />tion with mine-related facilities. The material of the fills <br />is generally derived from local sources and consists of sandy, <br />silty and clayey soils with a significant percentage of gravel, <br />cobbles and boulders. P4any of the fills are comprised of the <br />borrow from excavated cut areas. <br />Flood_plain_and_terrace_alluvium are the deposits identi- <br />-- -- --- ------- -------- <br />fied in the alluvial areas, consisting of a mixture of clay, <br />silt, sand, gravel, cobbles and boulders. These materials may <br />form lenses of similar-sized material, or may occur as a fair- <br />ly homogeneous mixture. Soils occasionally show mottling and <br />contain organic material. <br />Slumping_of_fine_grained material_in_steep_natural_slopes <br />has been identified along the boundary of the alluvium with <br />the fine-grained slope outwash deposits. The slumps occur in <br />the fine-grained outwash material, are localized and limited in <br />extent. Individual blocks are identifiable in the slumped <br />area. <br />A-2 <br />GEONYDRO CONSULTING, INC. <br />