IT. O. Russell—Subaérial Deposits of North America. 298 
Anatysss or Apose By L. G. Haxins. 
No. 1. No. 2. No. 3. No. 4. 
Constituents. SantaFé,N.M. Fort Wingate, N.M. Humboldt, Nev. Salt Lake City, Utah. 
LOM ers aseansee GOROY) = Scado. 26°67 19°24 
ENR OR ocala: ee UastG see Ol guna BATS) 1 gcc 3°26 
meso te ON Age hit Giga Rotor ike 1:09 
INO) eoeédosedesn COGS feaecre trace ...... SW PR trace 
(COLOR sea dsee aes DEAD) ov curbionte 36°40... SPOT ese 38°94 
AVI ON Sascn cases 2S! c. vsscaes BOW (or asecste PND) Gacece 2°76 
iG Oia aaa c ee eee EAC | denecie ibe Mm eee. trace 
Naz0O ......... vd Or Aad racer’ sc... OLS CMA eres trace 
ORT tae es TRG WARREN 25°84 _ ...... Soop cece 29°57 
BNO Se ett san xe) Ma a thks SOA avin: -23 
SOMse ee Ripe ween 0S eae “64 waa “53 
Ohh cat caNbaansasbae CGY: an Gane ROME EC esicise OH LC Sete “ll 
BOM ets. Aa DRAG hoo eccs O1Ok Tiida 1:67 
Organic matter PPO SE Sodcon Bem Oe waceacs 3437. n 2°96 
99-72 99-97 “99-9K ——. (100-35 
are readily soluble in ordinary surface waters: “Fladobe, on the other 
hand, has a complex composition, and carries many substances which 
on exposure to percolating waters would be dissolved out. This 
difference is shown especially by the absence of calcium from 
residual clays and its abundance in adobe. Correlated with those 
differences in chemical composition are marked contrasts of colour. 
The prevailing and characteristic colour of residual clays is dark 
red ; the adobe when not affected by organic matter is light yellow. 
ANALYSES OF ReEstpUAL CLAYS FROM THE SOUTHERN APPALACHIAN 
Reeron.! 
Constituents. No. 1. No. 2. No. 3. 
Si Opeeushissouncaaseas MO Bie sens BBOOY §— so0000 65°42 
IO. Sea we ORSON \ateies 55: 3 eee 29-17 
THEO Sobdecososncnes NOSSO. We sstic NHN 9 coasae 8:30 
FeO sannserseveiks ew Wy Fh: 2thtee ae i) ee trace 
ASO a sehen ma neatacas G4et ules. SN i |) CREE — 
P.O; eeeesesesensesee 10 slcieaeiorss hy ae o> | 2 oRee Pvelaialeea) Cree) 
Nias Onaiosiardsasncns SS cgouse 1:2 OW sceee 17 
Ohi coadseacsaesee WHOS. anaon Sine Fe -- 
Ke Oh a insarmie. cred ver Sty Was DOO) | snaoee 2°32 
iia Oe eae ek traceny ny sssac ey deen — 
CAO ese sdancnesces TOV naMAp ees 36.5) lueeeee "15 
Migs ON Bae Buteeedeegs ON) Soe hee ears CUB at ‘otacon 1:46 
H,0 (by ignition) NBHID = poosae 1279 SPR eewses 9°86 
100-07 100°64 99-84 
No. 1, Residual clay resulting from the subaérial decay of trap rock from 
Wadesborough, N.C. 
No. 2, Residual clay resulting from the subaérial decay of Trenton limestone, from 
Lexington, Va. 
No. 3, Residual clay resulting from the subaérial decay of Knox Dolomite, 
from Morrisville, Ala. 
1 From U. 8. Geol. Surv. Bulletins, No. 52. 
(To be concluded in our next Number.) 
