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"r~:~lun ~, ri,
<br />f 7br `~al~a~ yin. naui~t of ~Lrl,, ~.rl!~ii;::ir~u1
<br />:r~rls.7'here:.r,ils 1e,riurci in tedirntnl from atdiment;uc
<br />rucks on hi;;h it•rr. cr:.. 7'hc slol,c is 0 to ]'L perccut, crud t
<br />cluvation is 4,900 1.c. 5,400 feet. The natm~al vegetation .
<br />is mainly saltbush, rnbbitbrush, galleta, and ]ndian
<br />ricegrass. The average annual precipitation is 9 inches.
<br />(• The mean annual temperature is 59° F., and the frosty
<br />free season is 165 to 175 days.
<br />]n a representative profile the surface layer is
<br />yellowish-brown loam about 6 inches thick. The under-
<br />lying layer is brown loam about 9 inches thlt'n. It in
<br />turn is underlain by pink or white loam to a depth of
<br />about 44 inches. Shale or sandstone is below that
<br />depth.
<br />Avalon soils have moderate permeabilit}• and a mod-
<br />erate available water capacity, They are moderately
<br />alkaliner Roots can penetrate to a depth of 90 to 60 ,
<br />inches.
<br />9'hese soils are used for grazing, as ajldlife habitat,
<br />and for recreation./
<br />Representative $rpfile of Avalon loam, 3 to 12 per-
<br />_ cent~opes, NEl/4 sew 25, T. 8 S., R. 102 N.
<br />11~ to 6 ineheer yellowish-brown (lOYR 6/4) loam ~
<br />. dark yellowish brawn (lOYR 4/d) when moist;
<br />weak, platy parting to weak, fine, granular atruc- I
<br />' tun; soft, friable; calcanwns; moderately alka-
<br />AC-6 for 10 inches. light-brownd(7bYR 6/9) loam, dark
<br />brown (T.bYR 4/4) when moist; weak, moderate,
<br />subangular blocky parting to weak, fine auban -
<br />• lay blocky structure; slightly hard, triable; ral-
<br />eareous; moderately. alkaline; gradual,
<br />Cleo- boundary. smooth
<br />10 to 26 inches, pink (TbYR 7/d) loam brown
<br />(T.6YR 6/4) when moist; masaive• slightly hard,
<br />triable; calcareous; moderately alkaline; gradual,
<br />smooth boundary
<br />09-26 to l44 inches, white (lOYR 8/2) loam, light brawn_
<br />ve !fir (lOYR 6/2) when moral; masaive• herd,
<br />about 15r pereentagrgrav~el s~ moderately al~Caline;
<br />llCd--d4 to b4 inches, weathen;d shale.
<br />The A horizon is a very fine sandy loam or loam. The C
<br />horizon is gravelly ]oam or loam. Flakes, seams, and aod-
<br />ulea of j~~~r~m carbonate are is the G horizon.
<br />ArA-Ase)on loam, 0 to 3 percent s]opea, T}tjs soil
<br />is nearly level and is on high terraces.
<br />Included with this soil in mapping are a feK, small
<br />areas of Blackston soils.
<br />Runoff is slow. The hazard of water erosion is slight.
<br />This soil is used mainly for grazing and recreation,
<br />Capability unit VIe-1; Loamy Salt Desert range site.
<br />is gently aloltn loam, 3 to 12 percent slopes. Thls soil
<br />ridges, It has tgtteo rolling and is on high terraces and
<br />of the series. Profile described as representative
<br />Included with this soil in mapping are a few small .
<br />areas of Fruits and Persayo soils.
<br />eraRtenoff is moderate, The hazard of erosion is mod-
<br />This soil is used mainly for glazing and as wildlife
<br />habitat, Capability unit VIe-1; Loamy Salt Desert
<br />range site,
<br />lllnckston Series
<br />The Blackston series consists of deep,.~•ell-drained
<br />soils. These soils formed in sediment weathered from
<br />/.P.EA, COLOI;AUO
<br />basalt on high terraces. The slope is 3 to 25 percent,
<br />and elevation is 9,800 to 5,500 feet. The natural vege-
<br />tation is mainly saltbush, shadscale, rabbitbrush,
<br />galleta, and ]ndian ricegrass. The average annual'pre-
<br />cipitation is 9 inches. The mean annual temperature
<br />is 51° F., and the frost-free season is 160 to 175 days.
<br />In a representative profile the surface layer is
<br />pinkish-gray gravelly loam about 5 inches thick, The
<br />underlying ]a}•ers are pinkish-white ]:rave]]}• loam and
<br />very gravelly loam; these extend to n depth of about
<br />28 inches. Below these ]avers are sand, grave], and
<br />cobblestones that extend to a depth of GO inches or more.
<br />Blackston soils have moderate permeability above a
<br />depth of 28 inches and rapid permeability below that
<br />depth. They ~~~~ve a lots available water capacit}•, and
<br />they are moderately alkaline. Roots can penetrate to a
<br />depth of mole than 60 inches.
<br />These soils are used for grazing, as wildlife habitat,
<br />and for watershed.
<br />Representative profile of Blackston stony )oam, 3 to
<br />25 percent slopes, SEI/y sec. 15, T. 2 S., R. 1 E., in an
<br />area of grass.
<br />A1-0 to b inches, pinkish-ggray (T.bYR 6/2) gravelly loam,
<br />brown (T.bYR 6/9) when moist; moderate, fine,
<br />granular structure bnt weak, platy in the upper
<br />>tneh; soft, very friable; common dark mineral
<br />grains; 16 percent iragmenta of basalt, pebbles,
<br />and cobbles, calcareous; moderately alkaline;
<br />clear, wavy boundary.
<br />Clem to 14 inches, pinkish-white (T.6YR B/2) gravellyf
<br />loam, light brown (T.6YR 6/9) when moist; mas-
<br />sive; hard, very triable; common dark mineral
<br />grains, 40 percent basalt gravel; moth, visible,
<br />finely divided secondary calcium carbonate; eal-
<br />eium carbonate equivalent about 2b percent; mod, ,
<br />erately alkaline; gradual, wavy boundary. ~~
<br />C2ram-14 to 26 inches, pinkish-white (T.6YR 8/2) very
<br />gravelly loam, light brown (T.bYR 6/9) when
<br />moist; massive; very hard, firm; some thin dis-
<br />continuous lenses of weakly lime-cemented mate-
<br />rial; common dark mineral grains, 60 to 70
<br />' percent basalt gravel; visible secondary calcium
<br />carbonate, mostly finely divided; Calcium carbonate
<br />equivalent about 90 percent; moderately alkaline;.
<br />ggrradual wavy boundary.
<br />IIC9ea-28 to 6U inehea, sand gravel, and eobbl2Srthat have
<br />eoan;e fragmenLS wfiieh are mostly basalt; com-
<br />mon dark mineral grains; calcareous, some attu-
<br />~, mulcted secondary raleium carbonate on underside
<br />of sand grains and pebbles; moderately alkaline.
<br />The AI horizon is gravelly sandy loam or gravelly loam.
<br />BtD-Blackston ston~• loam, 3 to 25 ~ercenl slopes.
<br />This soil is gently sloping to steep and is on high ter-
<br />races and benches. It has the profile described as repre-
<br />sentative of the series.
<br />Included with this soil in mapping are areas of Uta-
<br />line and Avalon soils; these make up as much as 10 per-
<br />cent of the mapped area. Also included in some places
<br />are small areas of soils, along terrace edges, that have
<br />shale or sandstone bedrock at a depth of about 35
<br />inches.
<br />Runoff is moderate to rapid. The hazard of erosion is
<br />moderate.
<br />This soil is used mostly for grazing snd as a source
<br />of grave]. Gravel pits and borrow areas are common.
<br />Capability unit VIe-1; Loamy Salt Desert range site.
<br />Cebone Series p
<br />The Cebone series consists of moderately deep, tt•e)1-
<br />- '.
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