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Mapunit Component Descriptions <br />Soi[ Survey Area: C0680 Mesa County Area, Colorado <br />Mapnnit Symbol 118 MESA-AVALON-BLACKSTON COMPLEX, 1 TO 12 <br />PERCENT SLOPES, STONY <br />Component Name MESA Comp % - 45 <br />THE MESA SERIES CONSISTS OF VERY DEEP SOILS THAT FORMED IN ALLUVIUM ON HIGH <br />FAN TERRACES. TYPICALLY, THE SURFACE LAYER IS FINE SANDY LOAM ABOUT 4 INCHES <br />THICK. THE SUBSOIL IS SANDY CLAY LOAM AND CLAY LOAM ABOUT 31 INCHES THICK. THE <br />UPPER 10 INCHES OF THE SUBSTRATUM IS VERY COBBLY SANDY CLAY LOAM. THE LOWER <br />PART TO 60 INCHES IS VERY GRAVELLY SANDY CLAY LOAM. <br />Component Name AVALON <br />Con:p % - 35 <br />AVALON SERIES CONSISTS OF VERY DEEP SOILS ON ALLUVIAL FANS FORMED IN ALLUVIUM <br />AND COLLUVIUM FROM SANDSTONE. TYPICALLY, THE SURFACE LAYER IS SANDY LOAM <br />ABOUT 2 INCHES THICK. THE UPPER PART OF THE SUBSOIL IS SANDY LOAM ABOUT 6 <br />INCHES THICK. BELOW THIS IS 42 INCHES OF SANDY CLAY LOAM SUBSOIL, AND THE LOWER <br />PART OF THE SUBSOIL TO A DEPTH BELOW 60 INCHES IS CLAY LOAM. NATURAL <br />VEGETATION IS GRASSES, SHRUBS, AND FORBS. <br />Component Name BLACKSTON <br />Comp % - IS <br />BLACKSTON, EXTREMELY GRAVELLY, SERIES CONSISTS OF VERY DEEP SOILS FORMED IN <br />ALLUVIUM ON TERRACES. TYPICALLY, THE UPPER PART OF THE SURFACE LAYER IS VERY <br />GRAVELLY SANDY CLAY LOAM 21NCHES THICK. THE LOWER PART IS GRAVELLY CLAY LOAM <br />51NCHES THICK. THE NEXT LAYER IS VERY GRAVELLY SANDY CLAY LOAM 8 INCHES THICK. <br />THE UPPER 201NCHES OF THE UNDERLYING MATERIAL IS EXTREMELY GRAVELLY SANDY <br />LOAM. THE LOWER PART TO A DEPTH OP 60 fNCHES OR MORE IS EXTREMELY GRAVELLY <br />SAND. NATURAL VEGETATION IS SALT DESERT SHRUBS AND GRASSES. <br />Component Name Other soils <br />Comp % - <br />Manday, December O5, 2005 Soi[ Srsrvey information downloaded jrom National Soil lnfarmation System page 1 of ] <br />(NASJS), USDA Natural Resources Conservation Service <br />