336 The American Geologist. December, i904. 
vey in which Dr. Edgar R. Cumings ably assisted ; but later 
they have been given a more thorough detailed study by the 
senior author. 
The greater portion of the region under discussion is the 
hilly country in the northwestern part of Fairfield county and 
northeastern part of Pickaway. Although the edge of this hilly 
district in a direct line is only 15 miles or a little farther south- 
east of the Capitol in Columbus it has never been described. 
In many respects it affords the most satisfactory exposures of 
the Waverly formations to be found in central Ohio and on 
this account is of especial interest to the stratigraphic geologist. 
The hills just enter the southeastern corner of Franklin 
county bordering Big run for about one mile, the northwest- 
ern limit of which is about four miles southeast of Groveport. 
It is really a plateau dissected by numerous small streams, giv- 
ing the topography a somewhat rugged aspect and the excel- 
lent exposures of the various formations are due to the eroding 
agency of these streams. 
The geology of Franklin county was described by Dr. 
Orton and the "Waverly group" is represented on the geolog- 
ical map of the county as crossing its southeastern corner,* 
but there is no account of the Waverly formations as shown in 
the broken country where Franklin, Pickaway and Fairfield 
counties corner. 
LITHOPOLIS AND VICINITY 
In the narrow glen running parallel with the main street of 
Lithopolis, Fairfield county, known as Leyndecker glen or 
Dutch Hollow, which forms the northeastern boundary of the 
village, occurs one of the best sections to be found in central 
Ohio for studying the relations of the lower formations of the 
Waverlv series. The exposures begin with very soft argil- 
laceous shales capped by compact, heavy beds of Berea grit at 
a distance of about one-half mile below the highway bridge 
crossing the glen. This lowest shale probably belongs at the 
top of the Bedford formation while the Ohio shale is not seen 
in the immediate vicinity of Lithopolis. It may be seen, how- 
ever, on the banks of the Little Walnut creek at both crossings 
* Rept. Geol. Surr. Ohio, vol. iii, 1878, op. p. 600. 
