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Custom Soil Resource Report <br />Mass movement <br />A generic term for the dislodgment and downslope transport of soil and rock <br />material as a unit under direct gravitational stress. <br />Masses <br />See Redoximorphic features. <br />Meander belt <br />The zone within which migration of a meandering channel occurs; the flood -plain <br />area included between two imaginary lines drawn tangential to the outer bends of <br />active channel loops. <br />Meander scar <br />A crescent -shaped, concave or linear mark on the face of a bluff or valley wall, <br />produced by the lateral erosion of a meandering stream that impinged upon and <br />undercut the bluff. <br />Meander scroll <br />One of a series of long, parallel, close -fitting, crescent -shaped ridges and troughs <br />formed along the inner bank of a stream meander as the channel migrated laterally <br />down -valley and toward the outer bank. <br />Mechanical treatment <br />Use of mechanical equipment for seeding, brush management, and other <br />management practices. <br />Medium textured soil <br />Very fine sandy loam, loam, silt loam, or silt. <br />Mesa <br />A broad, nearly flat topped and commonly isolated landmass bounded by steep <br />slopes or precipitous cliffs and capped by layers of resistant, nearly horizontal <br />rocky material. The summit width is characteristically greater than the height of <br />the bounding escarpments. <br />Metamorphic rock <br />Rock of any origin altered in mineralogical composition, chemical composition, or <br />structure by heat, pressure, and movement at depth in the earth's crust. Nearly <br />all such rocks are crystalline. <br />Mine or quarry (map symbol) <br />An open excavation from which soil and underlying material have been removed <br />and in which bedrock is exposed. Also denotes surface openings to underground <br />mines. <br />Mine spoil <br />An accumulation of displaced earthy material, rock, or other waste material <br />removed during mining or excavation. Also called earthy fill. <br />40 <br />