Lower Cretaceous of Kansas. — Gould. 39 
ten miles northwest of Brookville measures sixty-five feet. 
Usually, however, they are not to exceed fifteen or twenty feet 
thick. Mr. Logan distinguishes two groups, the lower and the 
upper.* The upper group consists of a lignite horizon and a 
salt marsh horizon. This group was not noticed by the writer 
in the region. The following section taken at the mouth of 
Allum creek ten miles southeast of Kanapolis illustrates the 
stratigraphy of the lower part of the lower group. 
Feet 
5. Clay shales, yellowish, with coarse, dark brown ferruginous 
sandstone 15 
4. Massive, cross-bedded and concretionary sandstone, gray, 
brown and yellow with ferruginous bands and pockets 
forming a perpendicular blufif 36 
.3. Shales, yellowish and bluish, with sandy layers, containing 
traces of lignite and selenite 12 
2. Brown cross-bedded sandstone 10 
I. Slope from Smoky Hill river 10 
83 
This section is below the horizon which usually produces 
many fossil leaves, but it is the opinion of the writer that it is 
in the region in which this section was taken, viz : along the 
banks of the Smoky Hill and its tributaries, between Marquette 
and Kanapolis, that the true relations of the Comanche to the 
Dakota will eventually be worked out. 
c. Fossils. 
During the summer of 1898 leaves were collected in numer- 
ous localities in Ellsworth and Saline counties.- The best 
localities found are in the eastern part of Ellsworth county, 
four to five miles west of Brookville and from one to .three 
miles north and northeast of Terra Cotta. One locality es- 
pecially, in the southwest and northwest Cjuarters of section 2. 
T. 5 S. R. 6 W., yielded large quantities of very perfect leaves 
enclosed in nodular concretions. The locality is nearly a mile 
long and about two hundred yards wide, on the top of a hill. 
This is the concretion bed from which Charles Sternberg has 
-obtained so many fossils. Other good localities were some 
three miles northeast of the one mentioned on the southeast 
*Uni. Geol. Sur. of Kans., II, pp. 207-212, 1897. 
