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<br />below. <br />3.1 FAN DEPOSITS <br />The far, deposits are present from the east side of II. S. Interstate 70 to <br />more than five miles up Rapid Creek. Approximate>,y ZOCO feet east of the <br />highway, the deposits are at least 100 Peet thick north of Rapid Creek and <br />75 feet thick south of the creek. The deposits thin toward the west to zero <br />thickness at roadcuts along the highway. Rapid Creek is currently eroding <br />these deposits and no evidence exists of current sediment reworking or <br />depositior. withir. the drainage. <br />i • <br />The far. deposits are poorly sorted and contain silt- to large (greater than <br />six feet in diameter) boulder-size material which is comprised of basalt and <br />Mesaverde sandstone. The boulders are subangular to subrounded in shape, <br />and exhibit no preferred orientation except within Terrace D. Terrace D <br />deposits contain more rounded material, smaller boulders, and a few poorly <br />formed boulder horizons, indicating minor reworking of the sediments. A <br />bleached zone exists along the west slope of Terrace B which was produced by <br />inplace weathering of the material. <br />The poor sorting, non-preferred boulder orientation, and lack of rounded <br />materials indicate the occurrence of mudslide or colluvial deposits produced <br />in a high-energy depositional environment. Water-aided transport is <br />considered minimal. <br />• <br />7 <br />Hydro-Search, It1C. aeno • Denver • Austin <br />coriwcnrc Hvoaococisrs-ceaocasrs <br />