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ILLUSTRATIONS 
1—The Middle Mississippi River Region....................-.--------- 170-171 
age ak of terraces found in the Middle Mississippi ee” 
ee ofile showing sani various terraces in the Middle Mis- 
Sissippi River Region icc. .ceccten cnet ance ens scch tah ceecneneeennnetennee | 
4—Stratified eh Say in the Festus Scties. at the on local- 
ity, near the First Baptist Chruch, Festus, Missourt.....----- 180 
5—Level surface of the Festus Terrace at lags “Mo pias 18. 
6—Piracy of Sandy Creek by Joachim Creek, Jefferson Co., Mo. 184 
7—Two terrace levels at St. Peters, St. Charles Co., Mo.....----- 187 
br mnie ee hills rising above the flat surface of the 
Cuivre Terr a short distance east of Moscow Mills, as 
ide Coliary, ASSO tere sancti 
ape section of the Cuivre Terrace along the Cuivre River 
uth of Chain-of- Rocky. Lincoln County, Missouri.......-------- 190 
10-—Thinly laminated strata at the top of the Ape Terrace 
n the unnamed creek halfway between Fort Belt fauna 
ind Halls Ferry in the northern Pe of St Lous Co 193 
11—Stratified loess-like silt in a cu as g Labadie Creek a 
short distance north of Labadie, Franklin County, Missouri. 
“This 48 a part Gf the Cuivre Perracé. 2.25) oe 194 
12—Boeuf Terrace overlying residual mantle rock at Big Berger 
reek in Franklin County, Missouri, exposed by a road 
cat along Morel highway 04.24 pho ae 197 
13—Pink granite boulder in a silt deposit west of Oetters, 
toes County, Missouri. It is in the Boeuf Terrace and 
was probably carried to its present location by ice-rafting..--- 198 
14—Map ee wing the extent of, the Pleistocene ice sheets near 
the mee Mississippi River Region, according to Antevs’ 
ulletin of the Geological Society of America Vol 40......--- 199 
1S Gravel” of glacio-fluvial origin, composed ey of 
chert pebbles near Chain-of-Rocks, St. Louts........-2--------~ 214 
16—Drift on Watkins Creek a few tarde south: a U. S. high- 
way 66 and about a mile west of Chain-of-Rocks, St. Louis. 
This is the same section as shown in Table VI. This may 
be of pre-Illinoian age, or it may be IIlinoian drift inter- 
mingied with. Lafayette gravel 0 216 
PRE reer itieer boulders press of atone in the bed of 
kins Creek abou mile west of Chain-of-Rocks, St. 
Louis. Most of ey tet dete are about a foot in diameter 
and resemble the Baraboo quartzite closely.............---.------- 217 
18—Nebraskan, Kansan, and Illinoian till ie Laue Sandy 
Creek about ten miles south of Winchester, Scott Co., Ill..219 
eas arpa view - the quarry of the Illinois Sand and 
Materials Company at Alton, Illinois, showing six feet of 
drift "of possible pre- Bit ee overlying the limestone 
and in turn overlayed by loe 221 
20—Genéral view of the A ea drift at the east end of 
coe Park, St. Louis, exposed in the winter of unicek” 
in t for the super-highway crossing the Park........._- 
a Chen view of the pre-Illinoian drift (Fig. 20). 
aaweeewnesnceneese 
