160 The American Geologist. September, 190B 
of way in the vicinity of the cuts on the eastern slope of 
the Flint hills to the west of Reece just previous to their 
work so that there were "ideal exposures from which to 
make exact sections." Their detailed studies aided by 
these excellent exposures showed that the upper part of my 
section needed correction as they have indicated. At the 
time of my work the covered slopes misled me regarding 
the thickness of the strata between the upper cuts so that 
the total thickness was underestimated and the upper por- 
tion of the section correlated incorrectly. No's. 13, 14, and 
15 of my section were correlated with the Strong flint,* 
now known as the Wreford limestone ; but Beede and Sei- 
iards show that only No. 13 and the lower 15 feet, 8 inches 
(their measurement) of No. 14 belong in the Wreford lime- 
stone, which then has a total thickness in this section of 
•over 27^3 feet. The remainder of No. 14 represents the 
M'atfield shales with a thickness of from 58^ feet to 62 feet, 
while No. 15 is the Florence flint with a thickness of from 
2jy 2 to perhaps 25 feet. The correction above made also 
applied to the "section of Wreford limestone near Summit 
Station" given in the Cottonwood Falls Folio,t where No's. 
1, 2 and 3 correspond to No's 13, 14 and 15 of my original 
section, which has just been corrected. Making similar 
changes in the Cottonwood Falls Folio, No. 1, with the 
lower 15^3 feet of No. 2 becomes the Wreford limestone; 
the remainder of No. 2 represents the Matfield shales and 
No. 3 the Florence flint. The statement, farther down the 
same column of the Cottonwood Falls Folio, that the maxi- 
mum thickness of the AVreford limestone is shown at this 
locality should also be corrected because, apparently, only 
about 28 feet is shown. 
As already stated, the writer had but a day for the 
examination of the section from Grand Summit to Cam- 
bridge and did not have another day for the continuation 
of the section from Cambridge to Burden. For the general 
stratigraphy of the region he depended on the "Geologic 
section from Galena to Winfield by Geo. I. Adams, "t on 
which the lower limestone on the eastern side of the Wal- 
* Kan. Univ. Quart., vol. vi, p. 152. 
t Geol. Atlas U. S., No. 109, 1904, p. 3, col. 3. 
T Univ. Geol. Surv. Kansas, vol. i, 1896, pi. i. 
