210 
IOWA ACADEMY OF SCIENCE 
of blue shale into two portions. In the upper portion fifteen inches of 
limestone is surmounted by two feet of fragmental limestone. Immedi- 
ately beneath the foot of shale is two and' a half feet of ferrugenous 
limestone, then seventeen inches of another grayish limestone, then blue 
shale, a succession entirely unlike that at Bethany Falls except that a 
fragmental limestone is the topmost portion at each place and a shale 
lies beneath the lowest limestone. At Bethany Falls the division of the 
limestone into an upper and a lower portion is not due to the presence 
of a bed of shale. Further, along the same ravine we had come upon 
four distinct beds of “fragmental” limestone, two of which I have men- 
tioned. One other was at the top of the Winterset limestone and one 
on the De Kalb. 
It is therefore evident, 1st, that the term “Fragmental” as the name 
of the limestone at the base of the Missouri series should be displaced 
here in Iowa by the geographical name which has the preference, 
Bertha* ; 2nd, that the name Earlham limestone should be replaced by 
that time honored but misused name, Bethany Falls limestone, which 
is the name Broadhead originally used for this particular formation; 
and, 3rd, that the names for the limestones should no longer be made 
to include the beds of shale which separate them; but the beds of shale 
be recognized by names already given them elsewhere. This part of 
the geologic section in south central Iowa then stands as follows: 
Group. 
System. 
Series. 
Stage. 
Sub-stage. 
Paleozoic .... 
Carboniferous . 
Pennsylvania. 
Missouri 
Westerville limestone.** 
Chanute shale.* 
De Kalb limestone.** 
Cherry vale shale.* 
Winterset limestone.** 
Galesburg shale.* 
Bethany Falls limestone. 
Ladore shale.* 
Hertha limestone.* 
Since the preparation of the above paper a communication from Mr. 
Greene gives the following “log of a well drilled one-fourth mile south 
of the center of section 9, T. 63 N., B. 28 W., on the flood plain near 
the falls of Bethany.” This, like the preceding description, is printed 
*Adams, Girty and White, Stratigraphy and Palaeontology of the Upper Car- 
boniferous Rocks of the Kansas Section, Bull. No. 211, U. S. Geol. Surv. 
Erasmus Haworth, Kan. Univ. Quar., Vol. Ill, 1895. Univ. of Kan. Geol. Surv., 
Vol. I, 1896. Univ. of Kan. Geol. Surv., Vol. Ill, 1898. Univ. of Kan. Geol. Surv., 
Vol. IX, 1908. 
Adams, Haworth, and Crane, Economic Geology of the Iola Quadrangle, Kansas, 
Bull. 238, U. S. G. S., p. 18. 
In certain of these references it appears that Bain’s correlation has been followed 
on the supposition that it is correct. 
**See above references to the reports of the Iowa Geological Survey. 
