298 THE JOURNAL OF \GEOLOGY, 
Price’s quarry, on a small branch of Chequest Creek, west of Pitts-_ 
burg, and on Bear Creek opposite Bentonsport, the sandstones 
of this horizon are sufficiently developed to furnish a good quarry 
stone. It consists of blue calcareous sandstone which weathers 
brown on exposure. In places it is more or less magnesian. 
Correlation.—In Van Buren county, the arenaceo-magnesian 
beds constitute the base of the Saint Louis group. They have a 
greater development there than in Lee county where they are 
replaced partially or wholly by the brecciated limestone. They 
are represented at Keokuk, Warsaw, Sonora (Ill.) and elsewhere 
by arenaceous beds originally included in the Warsaw group. 
Mecn creer. 
pote MEOKUK, waR Caw 
Pace elnino 
Se LTC ray @eéL Fast So Cee 1 
teeta YY, ) eo aoe eer 
-<- 50O. 
arog nes ---- eels, me. z es: 
Sees eMac Toe FE a Seta S10) [LMS re ee acta | eee 
De SSeS eo Ras wa, OR, ABEN BS “He = 
Fic. 2.—Correlation of sections at Warsaw, Keokuk, Belfast and Rock Creek. 
The relation of the various beds is shown in the following com- 
bined section (Fig. 2) of exposures at Warsaw, Keokuk, Belfast 
and Rock Creek, while the accompanying table shows the classi- 
fication here adopted compared with those previously given. 
CLASSIFICATION OF THE FORMATIONS OF THE KEOKUK AND 
SAINT LOUIS GROUPS. 
Gordon FORMATIONS Hall | White | Keyes 
L. C.M. LowER CoaL MEASURES L.C. M.|L. C. M.|L. C. M. 
a Compact and Granular Limestones ‘3 ‘3 
8 (Keosauqua S.S.) oS} ra 5 
oa Brecciated Limestone aa re) 3 
| 2 5) N 
‘3 : = 
n Arenaceo-Magnesian Beds 5 5 
= ie Ww 
3 iss} 
Warsaw Shales and Limestones = ee 
: 
a Geode Shales os vy, 
o al a 
M4 Ss g 
Keokuk Limestone y, 
