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<br />.4. <br /> <br />.5. <br /> <br />SouthsideBasins <br /> <br />matelyparal1el. The Precambrian crystalline rods forming the core <br />oftherangeareintenselyfracturedandsub-dividedintomanysmall <br /> <br />Northside Basins <br /> <br />Upper Gore Creek <br /> <br />Black Gore Creek with <br />Tributaries: <br /> <br />Deluge Creek <br /> <br />l'olkCreei<. <br /> <br />blocks by numerous faults. <br />The Gore Fau1tcan be easily identified in the field, as it is <br />highly visible traversing through the area east of the top of Vail <br />Pass, then northwestward through Main Gore Creek just upstream of the <br />confluence with Black Gore. Westward of the fault, the sedimentary <br />rocks of the Minturn and Maroon Forrnations are very evident. The <br />Minturn Formation can be identified by the distinctive beds of coarse <br />grained gray to reddish sandstones, conglomeratic sandstone. sandy <br /> <br />Main Gore Creek <br /> <br />M111erCreek <br /> <br />Bighorn Creek <br /> <br />Timber Creek <br /> <br />Pitkin Creek <br /> <br />1'1111 Creek <br /> <br />Booth Creek <br /> <br />SprdddleCreek <br />Middle Creek <br /> <br />Red Sandstone Creek and <br />Tributary Indian Creek <br /> <br />and silty shales as well as the pinkish gray to gray limestone beds. <br /> <br />BuffehrCreek <br /> <br />The Maroon Formation conformably overlies the Minturn Formation. <br />The Maroon Formation consists of red mudstone or shale, siltstone <br /> <br />For the purpose of this hydrologic study, the Gore Creek basin is <br />divided into 27 sub.basins with catchment areas from 0.6 to 9 square <br />miles. These 27 catchments nave been given an additional identifier <br /> <br />and fine-grained sandstone. The Maroon Formation is in depositional <br /> <br />contact with the granitic Precambrian <br /> <br />crystalline <br />16 <br />Fault. <br /> <br />rocks near the upper <br /> <br />whiCh helps locate the catchment along Gore Creek as well as identifying <br /> <br />its location with respect to Gore Creek (see Table 1-1 and Plate 1). <br />Geology <br /> <br />end of the Piney River along the Gore <br /> <br />The Gore Creek Basin, along with the Eagle and Piney Rivers, <br />drains the west side of the Gore Range. The Gore Range is one of <br /> <br />The Minturn Formation is well exposed in the vicinity of Red <br />Sandstone Creek and is the oldest sedimentary rock in the area.16 It <br />is composed of medium to very coarse-grained, gray to reddish brown <br />sandstone, conglomeratic sandstone, thin beds of reddiSh brown silt- <br /> <br />the major massive uplift sections of Precambrian crystalline rock <br />typical of the ITIountainous regions of Colorado. Theupliftedfau1t <br />block forming the main element of the range is flanked by metamorphic <br /> <br />stone and sandy silty shale ~nd pinki sh gray to gray 1 imestone beds. <br />Gore Creek has eroded deeply into the Minturn Formation bya <br />combination of glaciationdnd alluvial action. The basic valley <br />shape through much of the main Gore Valley is the classic U-shape <br />typical of glacier action. This glacial erosion occurred mainly <br /> <br />gneisses and by the sedimentary formations extending westward. The <br />two major faul ts flanking the Range ar~ the Gure Faull ,,11 ich bears <br />roughly north-northwest and the Frontal Fault which trends dPproxi- <br />