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<br />TOTAL FALL OF THE GREEN RIVER
<br />The following table shows by sections the fall from Gr een
<br />Wyo., to the mouth of the river in Utah.
<br />Length and fall of stretches of Green River between Greer Riser, Wyo.,
<br />mouth
<br />I
<br />Distance' To
<br />tal fal
<br />' ?`nilesj j (feet;
<br />Green River, Wyo., to Flaming Gorge --------------
<br />------------ -----
<br />i 50
<br />
<br />
<br />
<br />.5
<br />
<br />21-0
<br />3
<br />3
<br />
<br />Flaming Gorge---------------------------------
<br />-. - - - -•-- ---•-- - -------- - -- --- ------------------------
<br />'
<br />
<br />3.5
<br />
<br />b
<br />.I
<br />Horseshoe Canyon _ ............................___..__.._.._.._ .._ 2, .5 ; 4
<br />-
<br />Neilson Flat ------------------------- - ----- -------------- - 10
<br />I 3
<br />FiingfisherCanyon ----------------------------------------- ------' LS 10
<br />Hideout Flat _----------------------------------------••----.. 3i 350
<br />Red Canyon --------------------------------------------------------------
<br />---•------•--------------------------------'•----- ---..---
<br />Littte Browns Park--------------------------------------------------•I
<br />
<br />6.
<br />4?
<br />
<br />75
<br />
<br />19
<br />
<br />............. - -'
<br />Swallow Canyon
<br />20. 5
<br />32
<br /> 1;.5 259
<br />Canyon of Lodore-----------------------------------------------------
<br />'
<br />21
<br />s
<br />Echo Park--------------------------------------
<br />•---------•------- --°---•-- ---- ------------•-----------
<br />?
<br />9
<br />98
<br />Whirlpool Canyon.--•--------------------------------------------------- {
<br />6 30
<br />Inland Park.- .-..------°°---------------------•-----------•-------.---
<br />I I
<br />1 I30
<br />I
<br />lit Mountain Canyon -------•---__----------•------------------•--.
<br />.....__.__.._...._.___-_____..I
<br />i 83 155
<br />n ............................
<br />mta Bas
<br />-
<br />Desolation Canyon__. ------------------------------------------ • -... 76
<br />27.5 355
<br />167
<br />Gray Canyon ------------------- -----------------------------------------
<br />Mouth of Gray Canyon to Green River, Utah---------------------------- 11 41
<br />Green River, Wyo., to Green River, Utah--------------------------------- 387
<br />117.3 2,010
<br />150
<br />- Green River, Utah, to mouth -------------------------------------------- 504
<br />3 1 1-
<br />s
<br />2
<br />Grand total-•-----------------------------•-----------•---------- . '
<br />,
<br />DESCRIPTIVE GEOLOGY OF GREEN RIVER
<br />BETWEEN GREEN RIVER, WYO., AND GREE N I
<br />UTAH "
<br />- - - - By JOHN B. REF.BIDE, J7. q
<br />- - -The course of the Green River between Green River, W,..
<br />Green River, Utah, lies upon the eroded remains of three may
<br />logic features of the region-a large, elongated troughlike ds
<br />in the rocks, with its greater dimension lying north and su?!
<br />Bridger Basin; a large archlike uplift, with its longer din`
<br />dying east and west, the Uinta Mountain region; and a seoogt
<br />- - - - gated..depresiaioA,?,,-itb_its greater dimension lying east and o
<br />Uinta Basin.
<br />The Bridger Basin lies mostly west of the Green River 'is
<br />stream above Flaming Gorge really passes along the eastern k
<br />far within it and parallel to it. The Uinta Mountain uplift b
<br />of its -length was in its fundamental plan a simple arch N
<br />reen R,iver.cro es it, however, there was a main lar?°
<br />.several smaller- subsidiary arches south of the main one, t
<br />liilee or aids of w, the folds trending in an east west dice- t?
<br />Zf:
<br />u t4tne de`aaed dda?lou' S*e ga31oB9 or G sen R ra Valley and ieteanxs to tai
<br />Ls foand in a Paper 4th' ieeWr ?votes on the geology of Gres. River N*e y W.waer
<br />mtag Snd Green Mver; IItah• r. s. Gee.: Survey' Prat'PaPer 132, pp. 35-50,1903.
<br />;:;pp1 rung ends of the main arch were broken by faults, an added
<br />;uplication. The course of the riI er thrt?urh this uplift area het%%ven
<br />Gorge and the Riln Rnck is irregular. lt- crosses the main
<br />u-hose highest remnants are the present Uinta Mountains, by a
<br />erg circuitous route through Flaming Gorge, Red Canyon, Browns
<br />Park, Lodore and Whirlpool Canyons; the northern minor arch diag-
<br />naih; through Split Mountain Canyon; then the intervening trough
<br />several meanders and the southern minor arch almost at a right
<br />,nr!e to the axis, in the neighborhood of Jensen, Utah. The river
<br />squarely across the Uinta Basin between the Rini Rock, south of
<br />1:>en t'tah, and the town of Green River, Utah, giving it cross sec-
<br />;: r that shows the basin to be verb- unsymmetrical. As seen from the
<br />nver, the rocks of the northern part of the basin form a belt on the
<br />sUlrfaee about 10 miles wide and dip with relative steepness.southward
<br />the lowest point or axis; the rocks of the southern part form a belt on
<br />urface about 95 miles wade and dip gently northward to the axis.
<br />1; is convenient; in the more detailed description which follows, to
<br />C:il'de the three large fundamental units into the smaller units formed
<br />r•I- the processes of erosion along the course of the river-the succes-
<br />.iee canyons and open valleys. These -ill be considered in order
<br />downstream from Green River, Wyo.
<br />Over much of the distance from Green River, Wyo., to Flaming
<br />Gorse, a series of beds of yellowish sandstone, light-gray limestone,
<br />am] gray shale, known to the geolo" t as the Green River formation,
<br />form the bedrock: The gray slopes are at many, places capped by a
<br />uiking bed of brown sandstone, long called the Tower sandstone
<br />because of its weathering into towerlike masses. At many places
<br />there are terraces covered by river gravel and other gravel deposits
<br />that represent former stages of the river higher and older than the
<br />present level but still much more recent than the Green River forma-
<br />4ori. The beds of the Green River formation here lie so nearly flat
<br />teat the eve can not detect any dip in them. Some S miles north of
<br />Flanging Gorge, and consequently near the boundary between the
<br />k'inta uplift and the Bridger Basin, an appreciable northward dip
<br />appears. This dip increases gradually southward Until.-at Flaming
<br />t? ire the rock layers stand on end. As a result beds underlying the
<br />Green River formation appear successively downstream. First there
<br />11 a series of white to brown sandstone, gray shale, red shale, and some t
<br />rua, beds, called the Wasatch formation; then a thick mass of rather ,
<br />wtt gray shale, the Lewis shale- then a series of interbedded brown
<br />n dstone, gray shale, and coal beds, the Me-saverde formation, Which
<br />h"p forms low ridges;:then a second soft gray shale, the Hilliard
<br />eroded down to a ,broad open lowland Beneath the I tf Vd
<br />near Flaming __Cxorge, there lie in suc„e4slon a:;`thin sand-.
<br />some lenses` o f shale and coal, the
<br />?e with T+`rontier, formation; a
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