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<br />67
<br />ELHERT COUNTY, COLORADO, EASTERN PART
<br />erale, cuutiuuous clay Blms ou faces of peds; gray
<br />euatiugs vu faces of peds iu We upper part of the
<br />hm•iuu; novcalcareous; clc:u•, smouW Luuudary.
<br />B2SL-]5 Lo 19 iucbcs, light yel3nwisb-bromu (2.5Y GI3j clay
<br />loam, light olive bro\cn (L.SY 5/31 +vben moist;
<br />ntoderalr Lo strong, wediuw, prismatic structmz;
<br />breaking Lo sLruug, i,edium, suhangvlar Llocky; very
<br />bard wheu dry, tires wheu wuisl; Wiu, coo Liuuuus
<br />clay Bless on Smlacc of peds; uaucalau'cuus; grad-
<br />ual, smooth Lomidury.
<br />B3c:~-19 l0 25 iucbcs, ]igbY ycllomisb-Crown (2.5Y G/3)
<br />saudy clay loam, ]igLt olive brown (2.51' S/3) wheu
<br />moist; +veak, medium, prismatic strucl m~u Creaking
<br />to moderate, medium, suhangular blocky; h:ud wheu
<br />dry, friable mbeu waist; Lhiu, patchy eL•iy Bless uu
<br />Loth LorizouLa] and vertical faces of peds; strongly
<br />calcareous; moderate Ua horizon with visible calcium
<br />carbuuale iu Buely divided forms and as small cou-
<br />creLious; gradual, smooW bomtdnry.
<br />Cca-25 to 92 iurhes, light Yellowish-bronco (2.5Y G/3)
<br />saudy cloy loam, light olive Lrowm (2.5T v/8) wheu
<br />moist; wassice Lo eery weak, coarse, subaugular
<br />blocky strutlm'e; bard what drS, friable mbcu
<br />moist; very sLraugly calcareous; prominent Ca
<br />horizon with a large amount of accumulated Calcium
<br />carbonate in thin scams and streaks and as cou-
<br />creLion,; gradual, smooth bouudary.
<br />C--f2 Lo GU iucbcs, light yellowish bru\+m (IOYIt G/9) heavy
<br />salldy loam, )•eI1oR'tsh hron•n (IOTA 5/9) mhell
<br />moisC; massive; slightly hard wheu drA friable
<br />A'hell moist; strouglS calcareous; less accumulated
<br />calcium carhouaLe Wan iu We Cca horizon.
<br />The texture of the Al horizon ranges from loam to
<br />saudy loam. The thickness of that horizon ranges from
<br />3 to S inches. The tea Lure of the B2 horizon ranges
<br />from clay loam Lo svndy clay loam. Thicluness of the
<br />B2 horizon rannges from 4 to 15 inches. The thickness
<br />of the sohlm rannges from 20 to 3G inches. Below a depth
<br />of 18 inches, the soils are n eakly calcareous to rery
<br />strongly calcareous.
<br />RGNOHILL SER1E6
<br />This series consists of moderately deep and deep, mod-
<br />erately foie textured Brown sails. These soils developed
<br />in material weathered from fuse sandy shale and shalt'
<br />sandstone of the Laramie, the Fox Hills, and the upper
<br />Pierre formations, modified in many ]daces by deposits
<br />of loess or of loamy material carried by water.
<br />These soils occur on uplands in areas where the slope
<br />range is 3 to 15 percent. The surface layer is thin, and
<br />the composite texture of this horizon and the subsurface
<br />layer is clay loam or loam. In areas where the soils are
<br />clayey, the nati+re vegetations includes western +vheat-
<br />c •ass, blue grama, galleta, and sacaton. in areas where
<br />Lhe soils are loamy, the native vegetation consists of blue
<br />grama or a mixture of short grasses.
<br />The Renohil] soils are deeper (.ban the Midwa}• soils,
<br />and they hate a B2t. horizon, which Lhe 1,lidway soils
<br />lack. They have a thimler solum than the Ulm soils, and
<br />they contain less sand than those soils.
<br />Profile of a B.enohill soil in an area of native grass-
<br />]aud, approsilnatel,y G00 feet east and 300 feet south of
<br />the NW. corner of the Sl'Vl/4 of sec. 4, T. 8 S., P,.. 5S Z~1.:
<br />Al--0 to 3 iucbcs, grayish-bromu (2-5Y 5/2) loam, dark
<br />grayish brown (2.SY 4/2) wheu moist; meat;, fine,
<br />suhangular blocky structure breaking to moderate,
<br />Bne, granular; soft wheu drp, very friable wheu
<br />moist; uoncalcareous; clca r, smooth bouudary.
<br />B21t-3 Lo 7 iucltes, grayish-bromu (2.5Y 5/?) heavy clay
<br />loam, dart- grayish brown (2.5T 9/2) mhen moist;
<br />moderate Lo strong, Bue, prismatic structure break-
<br />ing to moderate to strong, line, subaugular Ulocky;
<br />763-509-BG--G
<br />Lard when dry, very friable \+'LL'll mGlat; thin,
<br />patuby clay bloc a, both liorizuulul and vw'Lical
<br />faces of peds; nuucalca reuus; clear, auiuoW bouudary.
<br />L'22L-7 to 7] iucbcs, light yrlluwisL-bromu (2.5Y G/3) clay
<br />loam, light olive brown (P.LY 5/9) mbw, moist; mod-
<br />erate, liuc, prismatic structm'e breaking Lu moderate,
<br />lint, su L;mgular block}; rcry Lard n'beu dry, 5rw
<br />wheu waist; maul', Lhiu, patchy clay films ou boW
<br />borizuutal and vw'Lical faces of peds; very struugly
<br />calcareous; clear, Smooth bouudary.
<br />L'Sca-7] to 2U iucbcs; aliva-gray (5Y W/21 heavy clay loam,
<br />olive gray (5Y 9/z) wheu moist; +veak, cua rse,
<br />priswaLic structure Brea king to weal., medium,
<br />auguiar blocky; eery hard mheu dre, Brm wheu
<br />moist; wauy, coarse, prominent, IigLL oli re-bromu
<br />(2.5Y 5(U) wotLics; sU'ougly calcareous; weak Ca
<br />borizou mith some visible calcium carbonate as
<br />coucrehous; gradual, wavy boundary.
<br />It-2U to 24 inches -}~, weakly wealLered clayey shale;
<br />calcareous.
<br />1'he lecture of Ule B2C horizon 1'311geS fl'Olll Cla}' loam
<br />ar,d silty clay loaan to clay. The thickness of that ]lorizou
<br />rannges Egan S to 14 inches. The thickness of the salum
<br />ranges from 1G Lo GO iucbcs.
<br />
<br />STONEtlATt SERIES
<br />This series consists of moderately deep, well-drained,
<br />moderately sandy Brown soils of the High Plains. These
<br />soils developed m sandy and gravelly, calcareous out-
<br />wash. Most of the ouL+cash is from the Ogallala forma-
<br />tion, i+'hich is of Tertiary aye, but some of the out+vash
<br />appears to be of Pleistocene age.
<br />The Stoneham soils in this survey area are moderately
<br />developed. The color is generally fighter than that oi'
<br />the modal soils of the series, the structure of the B2
<br />horizon is less well defined, and the depth to lime is less.
<br />The color of the surface layer is lighter than very dark
<br />brown (lOYIL 2/2). The feature of the B horizon be-
<br />comes sandier and the structure weaker as the climate
<br />becomes drier toward the southern part of the survey
<br />area. Lime is abundant in the lower part of the B
<br />horizon and the upper part of the C horizon. The slope
<br />gauge is 1 to 1S percent. The native vegetation is grass.
<br />The Stoneham soils are sandier and lighter colored
<br />than the P1aUter soils, and they have a less well developed
<br />subsoil. They are less sandy than the Ascalon soils and
<br />are lighter colored irr the surface layer. Their Bet hm•i-
<br />zon coutaiis ]none silt. and gravel than that of the Ascalon
<br />soils.
<br />Profile of Stoneham sand}~ loam ii an area of grass-
<br />land, 200 feet east and 100 feet north of the SW. corner
<br />of the IV~';71f~ of sec. 5, T. 12 S., R. 5S '~T.:
<br />Al--0 to 4 inches, light brownish-gray (lOYR G/2) sandy
<br />loam, dark grayish bromu (IOTR 4/2) wheu moist;
<br />moderate, flue, Srauular structure; soft wheu drp,
<br />verS friable when woisC; calcareous; clear, smooth
<br />bomtdary.
<br />D21.-9 to 12 inches, light brownish-gray (lOTII G/2) heavy
<br />loam, dark grayish bron'u (lOTR 4/2) when mofst;
<br />weak, wediuw, prismatic structure breaking to mod-
<br />erate, medium, subaugular blocL-y; hard wheu dry,
<br />friable mhcu moist; Wiu, patchy clay Blms ou boW
<br />horizon L•t] and certica] faces of peds; abouC 5 Per-
<br />cent fine gravel; calcareous; clear, smooth boundary.
<br />Baca-12 to 75 iucbcs, pale-brown (lOYR G/3) loam, brow^
<br />(lOYR 5/3) wheu moist; meat-, medium, suhangular
<br />blocky structure; bm'd wheu dry, triable mher
<br />moist; about 5 percent gravel; strongly calcareous;
<br />meal: Ca horizon wiW visible calcium carbonate as
<br />coucretians and in Buely divided forms; clear, wavy
<br />bouudary.
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