Laserfiche WebLink
40 <br /> hogbacks produced by the unequal erosion of upturned alteraatl g <br />e ce, where the hard quartzite is common, occur sharp cast.ellate <br /> beds of bard sandstone and soft shale. or_ns similar to those in the Grand Canyon of the Colorado <br />- <br /> . <br />On the south side of the range in the longitude of Vernal the altttd <br /> of the higher plateau ranges from about 8,000 feet at the front t ' PRINCIPAL STREAMS <br /> 000 feet where it merges with the old mountain topography of The Duchesne River and its tributaries drain most of the t'inta <br />about 9 <br /> , <br />the central portion of the range. Farther west the altitude reach <br />Basin in Utah. The main stream is formed by the junction of its <br />f t <br />t <br /> o <br />000 feet or more. This feature has been described for a par <br />-North and West Forks at Stockmore, in the northwestern part. of the <br />10 <br /> , <br />outhwestern portion of the range by Lupton." esin. The Forth Fork rises in several small glacial lakes at the base <br /> S <br />The top of the plateau sloping gently from the mountains is an or Bald Mountain and Mount Agassiz, two prominent peaks which <br />ardless Q <br />tions re <br />f <br /> g <br />orn.a <br />are 11,947 feet and 12,433 feet respectively above see level. The <br />old erosion surface that has beveled all the <br />mo <br />th <br />i <br /> e <br />n <br />their hardnes or position. ear the mountain marg <br />- lakes are from 10,000 to 11,000 feet in altitude, and from them the <br />s th <br />ll <br />l <br /> ey <br />va <br />resistant strata fore:: low ridges bounding longitudina <br />stream descends rapidly in a southerly course through a glacial <br />has been covered by4_ <br />f <br />t <br />i <br />i <br /> ace <br />canyon <br />s sur <br />o <br />ts junction with the West Fork. The West Fork rises at <br />occupy the areas of softer rock. Th <br /> pebbles and boulders _ the base of Heber Mountain, in the Wasatch Range <br />mantle of coarse gra+ el composed largely <br />and flows almost <br /> h <br />, <br />red sandstone from the central portion of the range. Fear its out e east for about 20 miles. It. rises at s. lower altitude than the <br /> margin the plateau is cut by deep canyons, fete of which reach co North Fork; its canyon is also much broader and the topography is <br /> letely across the plateau so that east west travel along the base ,s rugged. <br /> p <br />the range is comparatively easy, whereas along the front of From Stockmore Duchesne River flows southeastward through a <br />l lower levels there <br />t b <br />d <br /> . <br />roa <br />plateau it is practically impossible. At severa <br />canyon bordered an both sides by high cedar clad ridges. <br />ll incl.;' <br />d <br /> sma <br />broad gravel-covered bench lands, open valleys, an <br />11?ut 22 miles below Stockmore Rock Creek enters the main stream <br /> basins along the principal streams, and these tracts are. estensiv Item the north, and the canyon broadens out as the river skirts along <br /> used for agriculture. All that portion of the range west of a northe west base of the Blue Bench and swings southward to the town of <br /> south line passing through the Green River at the mouth of Hen. Duchesne. Here the Strawberry River enters from the west <br />and the <br /> , <br />Fork has been surveyed topographically by the United States Gee <br />main stream tapes an easterly course for the next 35 miles through a <br /> and for topographic details the reader should cony t.„ad valley following the general direction of the trough of the <br />real Survey <br /> , <br />the Marsh Peak, Gilbert Peak, Hayden Peak, Coalville, Straw be C inta Basin syncline. <br />In this stretch 'the stream receives Lake Fork <br />" <br /> , <br />anotber important tributary from the north, entering near the town <br />Valley, and Vernal topographic maps. <br />d near the <br />h <br />i <br /> r. <br />ea <br />ns <br />y <br />'tlvton, and Cottonwood and Antelope Canyons on the south <br />All the great canyons of the Uinta Mounta <br /> of the range and descend to the north or to the south. The str <br />contribute uncertain and intermittent flows. <br /> flowing to the south constitute the chief source of avatar supply .,. Near Randlett the Uinta River empties into the Duchesne from the <br /> the Uinta Basin. As the axis of the range is nearer the north than <br />and the main stream again turns to the southeast and finally <br /> south margin, the canyons on the north slopes are hotter than t <br />reaches the Green River a short distance below Ourav. No important <br /> on the south slopes. All the larger canyons have the character trbutaries enter below the Uinta. <br /> P lactation. Their upper portions have .been, Rock Creek is the first important . tribute to enter the Duchesne <br /> cleaned out by ?he ice, but their middle and lower ortions col <br />P ? belost. Stockmore. It rises in a broad, flat-bottomed, amphithea.tral <br /> heavy morainic deposits. The streams in these canyons flow .. basin: bounded by precipitous walls and containing 20 or more glacial <br /> <br />, and as they have lowered their beds, recai et:, among which is the famous Grandaddy Lake. The catchment <br />the dip of the strata <br /> considerable. help from the glaciers, they have come to flow across is immediately east of that of the North Fork of the Duchesne <br /> edges the layers in the great Uinta fold. River and has an average attitude of about 10,000 feet above sea <br />truncate <br /> <br />igher cen ntralp ortion of this fold is now soul ture m ` le el. <br />P It i heavily wooded where there is sufficient soil to permit <br />The <br />The. <br /> <br />many of which rise 12,000 to 13,000 feet ab , <br />u•er growth; but it has been so well cleaned out by glaciation that <br />serlea of peaks <br /> , <br />level, and.ixnto natT O ap,.rs which project into the basin red o -^ these are now continuous areas, square miles-in extent <br />, share there <br />= - <br /> <br /> <br /> <br /> <br />? gl F <br />r not s ,Ificient loose I3jaterial f6., tr <br />nnumber OI Gtr^y F+ pa Il ne +'at <br />ees or s'+^tbs to gain a footiag, <br />aiga <br />into a !a <br />St <br />de <br />divide <br />divide <br /> - - <br />? <br />()' <br />e H? e co_.:r. u?. w_t 14 miles of its course the stream flows nearly due south <br />C7eek h <br />Deep <br />CT The <br />:on <br />r r <br />V <br />w " w ae a,t? , ?.F, r rah : I, it s sh a F rp nner gorge <br />such as is chsractersstic of the canyons <br />i <br />-: <br />f th <br /> , <br />: <br />sue ?? - <br />o <br />e <br />;? .s P? 4z, p, s , :e r T