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active debris fans Debris flow deposits that show signs of historic <br />activity. Active debris fans are often channelized into <br />older debris fan material. There is little or no <br />vegetation and rocks often appear buff in color. <br />Active debris fans contain sorted gravels from in the <br />channel and unsorted matrix supported clasts. <br />submerged active debris fans Active debris fan regularly inundated by the active <br />channel. Fines and small clasts are winnowed away <br />during inundation, leaving generally large angular <br />rocks and boulders behind. These deposits cause <br />constrictions in the main channel and often form <br />riffles and rapids. <br />talus Unconsolidated alluvium deposited by rockfall or as <br />scree at the bottoms of hillslopes. Generally highly <br />angular and not embedded. <br />submerged talus Talus regularly inundated by the active channel. <br />EOLIAN DEPOSI <br />eolian sand Wind blown sand deposit. Eolian sand generally <br />occurs adjacent to large recirculating eddies whose <br />sandbars act as source areas. Deposits are often <br />expansive and form tall steep dunes. Dunes are <br />vegetated with grasses and small shrubs <br />HYDRAULIC FEATURES <br />eddy Low velocity recirculating flow. <br />stagnant water Water sheltered from downstream or recirculating <br />flow. No observable current. <br />swash zone Low velocity zone where wave energy from near by <br />rapids or riffles disturbs the surface of the water. <br />Flow is most often recirculating but may be slow <br />downstream as well. Waves strike the shore at an <br />oblique angle and may cause natural levees of gravel <br />to form at water's edge. <br />exposed material Bed forms or mid-channel islands or bars exposed at <br />time of mapping. <br />III