Osage vs. Augusta. — Weller. 
15 
f Kaskaskia group. 
St. Louis group. 
Mississippian 
Series. 
"Chester shales." 
"Kaskaskia Limestone. 
Aux Vases sandstone. 
["Ste. Genev 
J St. Louis lir 
I Warsaw limestone (in part, 
leve limestone, 
mestone. 
Osage group. 
^ Kinderhook group. 
not typical). 
Warsaw shales and lime- 
stone (typical). 
"Geode bed." 
^ Keokuk limestone. 
Upper Burlington limestone. 
Lower Burlington limestone. 
Chouteau limestone. 
Hannibal Shales. 
Louisiana limestone. 
In 1893, at the time of publication of volume one of the 
Iowa geological survey, the "misconception" under which the 
name Osage was proposed had been discovered by Mr. Keyes, 
and the name Augusta was proposed as follows:* 
Augusta Limestone. 
This term is applied to those rocks exposed in the Mississippi 
valley which have hitherto been called the Burlington and Keokuk 
limestones. 
In this initial definition of Augusta, no mention is made 
of the Warsaw, but in the general classification of the strata 
the Warsaw was divided between the St. Louis and the Au- 
gusta in the same manner in which it was divided between 
the St. Louis and Osage in the previous paper. That the 
name Augusta was recognized at this time as synonymous 
with Osage, is shown by the following sentence '.f '!" the 
meantime Williams suggested for this limestone the title 
'Osage,' from the name of the chief river of southwestern Mis- 
souri, which cuts through soine of the Lower Carboniferous 
series in Saint Clair county." Apparently the only reason in 
the mind of its author for the proposal of Augusta, was his 
belief that it was a better name than Osage. 
*Iowa Geol. Surv., vol. I, p. 59. 
fLoc. cit., p. 59. 
