94 TJte A)i)erican Geologist. Febnuiry, 1893 
warded witli succt'ss far lieyond the writer's expectations. Soon 
after beginning the river section on the Big Piney, a fossil stratum 
M'as found lying between the limestone below and the sandstone 
above. This stratum with fossils was found in every bluff from 
Cabool to (lasconade City, and from lliverside to Doniphan. 
Numerous specimens were collected and are now in the survey 
collections at Jefferson Cit}'. 
At the writer's request Prof. R.R.Rowley visited several of the 
noticed localities. He writes that the stratum was easily found 
from the writer's description and could easily be recognized at 
widely separated localities. 
In addition to the above localities, the writer has found fossils 
of a similar nature in sltfi at Cherry Vallc}' Iron bjink. In 
widely separated areas throughout the entire extent of the Ozarks 
the writer has found fossils in chert similar to the ones found in 
the river sections. In every case they were found in chert below 
outcrops of sandstone, never ahnre. These fossils have been 
found in areas which have been described as "First sandstone." 
Summing up the results of the study of the above sections, the 
writer arriA^es at the following conclusions: 
First. — That the bed of sandstone in which are located the de- 
posits of specular iron ore in Crawford, Dent, Phelps, Pulaski, 
Texas, and other counties are continuous and are synchronous with 
the beds of sandstone followed down the northern and southern 
slopes of the Ozarks. Second; that this is the only bed of sand- 
stone of any importance, exposed within the region. Third; that 
the terms "First," "Second" and "Third" sandstone are not 
based on sufficient evidence to warrant their retention. In fact 
that these terms have been applied to the same bed in different 
parts of the Ozark mountains. 
In view of the above facts, the writer proposes that in place of 
the a])0ve terms the name Roubidoux be applied to the bed of 
sandstone above described; and that to the heavy bedg of lime- 
stone occurring under the above sandstone be applied the name 
G-asconade. These terms being taken from the streams along 
which these rocks typicallj' occur. 
If any one cares to become acquainted with the detailed reasons 
for the above conclusions, he will find them, together with careful 
sections in the forthcoming report on the "Iron Ores of Mis- 
souri," published by the Missouri Gleological Survey. 
