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<br />B2:: <br /> <br />3 to 10 ili1ches, b:t'oWl!, (7.5m 5/4) light clay lOG, brown <br />(7.5YR ~4) "When moist; _ak to moderate medium pri_tic <br />atructure breaking to mod<erate medi_ subangular blocky <br />st.ructure; very hard when dry, friable when moist, thin <br />nearly continuous clay films on vertical and horizontal <br />pad faces; noncalcareous; mildly alkaline, clear smooth <br />bouQdary. <br /> <br /> <br />oor~3'30 <br /> <br />30il Mapping Unit 3: !~1l_ rocky and deep moderatelY dark color~ <br />~oUs of the upland~. <br /> <br />Medium depth soUs occupy l.oWflr portions of the narrow mesa divides. <br />They have fo~ed in local wind deposited sandy materials derived <br />from sandstone for the most: part. The follOwing profile is repre~ <br />ae",tat.ive of some of the soUs that have formad over sandstone in <br />'1I1gebrush oplll1inga above juniper covered slopes: <br /> <br />Al 0 to 3 inches, brown (7.5YR 513) flne saDdy loam, brown <br />(7.SYR 4/3) moist; weak coarse platy structure breaking <br />to lIlCderate very fine granular structure; 60ft when dry, <br />'\retry friable whon moist; I1Cllca!eareaous; neutral; clear <br />SllIOoth boundary. ' <br /> <br />AC 3 to 18 inches, brown (7.5m 5/4) light fine aandy lOlilll, <br />brown (7.5YR 4/4) mobt; weak coarse pd_tlc structure <br />breaking to weak coarse eubangular blocky structure; <br />hard when dry, very friable when llI(J1st; nuncalcareous; <br />neutral; gradual _oth boundary. . <br /> <br />C 18 to 24 incheo, brown (7.m 5/4) 11ght fine sandy 1_, <br />brown (1.5YR 4/4) _ill!:: iU136ive; hud meA dry, very <br />f:d.lble when moist, few 80ft sandstone chips; non- <br />calcareous; neutral. clear irregnlu bo~nd8ry. <br /> <br />:R 24 inches and below, light brown (7.5YR 6/4) nd reddish <br />yoel1ow (SYR 6/6 rock sandstone whieh is nOll.calcareous. <br /> <br />l)ef:p. _derately dark colored loamy IlOUS l>lId.ch are' noncalcareone <br />ttl del'tba ,,):f. 6 to 24 inchcs occupy the _tiler slopes on the <br />dh'idos. Often they have formed in. windblown, calC!llreous deposits. <br />Tlw f,;llcm1ng !'l:ofUs :i.a r.'ln:<!llle~taUve: <br /> <br />J\.1 {) t(, 3 inches, broWll (7.5YR 5/2) 10lilll, dark brown (7.5YR 3/2) <br />when moist; weak _di_ platy st:ructure breaking to <br />_derate fine gramJlar structure. soft llhen dry. 'Il'tIll:Y <br />friable whmn moist; l1Onca1e~n?aous; mildly a1kaUne; ellUlI' <br />smooth boundary. <br /> <br />.- <br />