288 
If the limestone in section VI is to be correlated with the upper lime- 
stone, it shows what is probably a littoral phase of the layer, which to the 
west shows only deep water conditions. 
CONCLUSIONS. 
To briefly summarize, the Chester or Huron formation of western Mon- 
roe and eastern Greene counties consists of three limestones with sepa- 
rating sandstone and shale. 
Dr. E. O. Ulrich, of the United States Geological Survey, has examined 
the lists of fossils given herewith and expressed the opinion that they rep- 
resented the greater part of the Chester of Kentucky and southern Illinois. 
As the stratigraphy seems to confirm this, the following correlations are 
made: 
Upper (third) limestone. Birdsville formation. 
ee Upper sandstone. 
g — 
os) Middle (second) limestone. Tribune Limestone. 
=i - 
= Middle sandstone. Cypress sandstone. 
a 
Fe 
o Lower (first) limestone. | Ohara limestone member. : 
: Ste. Genevieve 
Lower sandstone. | Rosiclare sandstone member. J 
at ; : aes BONES ye Formation. 
. @jlitic upper portion of Mitchell. Fredonia odlitie member. 
ee ae 
Remainder of Mitchell. St. Louis limestone. 
The line of division between the St. Louis and the odlitic above has not 
been located in Indiana, but the latter is probably at least 80 feet thick. 
