CLAYS, SOILS, ETC. 227 
SOUTH DAKOTA AND WYOMING. 
A. Red clay, east of Newcastle, South Dakota. 
B. Red clayey sandstone, east of Spearfish, South Dakota. Analyses A and B by 
George Steiger, record No. 1854. 
C. Loess, Cheyenne, Wyoming. Analysis by L. G. Eakins, record No. 1066. 
99.69 | 100.28 
COLORADO, 
A. Loess, Denver. 
B. Loess, Highland. 
C. Concretion in loess, Wray. 
A, B, and C collected by 8. F. Emmons. Analyses by L. G. Eakins, record No. 
1066. 
D. Clay, Davis ranch, Pueblo quadrangle. 
E. Clay, head of Rock Creek, Pueblo quadrangle. 
D and E collected by G. K. Gilbert. Analyses by George Steiger, record No. 1457. 
A B Cc. D E 
BIO Bs ced ecisearrn bcd ei ceSiers sities berms ne a etaaee ee sapere sess 69.27 | 60.97 | 70.63 | 63.52 76. 56 
INS O3 occ deoiscorsenterd cere dealope cece el eesierasieslisisieoeteielo Mens 13. 51 15. 67 10. 43 24.72 8.30 
MGs O9 2cccdeie cele meee cane ee ted chemwn cere scout on keke 3.74 5.22 2.58 43 38 
OO) stavcie-srcsessave are sisraeiets ascta siatsni nin aimee s SG eReT oeialare eee 1.02 +35 ABS sic ceiescusseie|byersimisreese 
BO Si.c beste crn meicismoneeactane nna ecrdcemeenienee tence 1.09] 1.60} 1.13 13 124 
CAO reiiceremecreritn Soa terctnand ateinteteie diate a aisimemersatied 2.29 2.77 4.64 -30 12 
NGaO io cienctrmeeemeeeeemeenewnscuecc se nceinetci 1.70 97 1.29 | trace trace 
4 na Sa tinct Gene RCE ERE ESE 3.14 2. 28 2. 50 ‘eee tapes 
20 at 100°.... : 26 
H30 above i00° } 4.19 } 9.83 i 3.771 gar] 4:40 
TiOg.. 
P2035. . 
MnO 
COo.-. 
Organic matter 
