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<br />-- <br /> <br /> <br />I <br /> <br />GEOLOGIC TRRMINOLOGY <br /> <br /> <br />Th, gool"" ,~,,,pti'" i""i~'" ", ",MOO' ,_,ti<>,," origin" ,.,ti""bi, _. Goolo~' J <br />identification is interpretive. Judgment is sometimes limited due to small or disturbed samples. I <br /> <br />General categories of geologic deposits, and descriptive information is as follows: <br /> <br />ALLUVIUM COARSE: Sandy (and gravelly). Stratified. Deposited I <br />from fast moving waters in streams and rivers. <br />(Includes glacial outwash.) I <br /> <br />FINE: Clayey and/or silty. Stratified. Deposited <br />from slow moving waters in streams, rivers, I <br />_ lakes and ponds. <br /> <br />MIXED: Combination of Fine and Coarse Alluvium. I <br /> <br />BEDROCK: Wide range of characteristics: from bard, dense, consolidated rock; to <br />soft, compressible, and unconsolidated soil-like material. I <br /> <br />FILL CONTROLLED: Compact, uniform material; inorganic; no <br />debris. I <br /> <br />UNCONTROLLED: Loose or variable density. Mixture of soil <br />types. Often contains debris and organic II <br />material. <br /> <br />TILL: Normally contains a wide range of grain sizes, from boulders through I <br />clay. Usually non-stratified. Deposited directly from glaciers. <br /> <br />LOESS: Silty. Non-stratified. Upper layer. Deposited from wind. I <br /> <br />SLOPEW ASH: Organic and/or inorganic material washed from slopes and redeposited. <br /> <br />SWAMP DEPOSITS: Peat, muck and marl, and organic soil. Formed through accumulation I <br />of organic material under water. <br /> <br />TOPSOIL: Contains both inorganic and organic material. Upper, black layer of I <br />soil. Formed by weathering of inorganic soil and accumulation of <br />organic material. <br /> <br />TUMBLEROCK OR Dominantly gravel, boulders and rock slabs. Deposited from gravity flow I <br />COLLUVIUM: down hills or cliffs. <br /> <br />WEATHERED BEDROCK: Bedrock which bas been substantially weathered through disintegration I <br />or decomposition. Texture and composition grades into bedrock. <br /> <br />WEATHERED SOIL: Texture, composition, and position is intermediate between topsoil and I <br />non-weathered soil. .. <br /> <br /> <br /> <br />I <br />