IEMs, CILANSSIOMEASNON Ole Wiss, WAPI PAIL AB OZ OUC 
ROCKS OFFGE Nik eae Sais 
[Continued from Vol. III., No. 6.] 
THE NEOSHO FORMATION. 
Between the Cottonwood formation and the base of the first 
massive limestone, containing an abundance of flint in layers, is 
a series of gray limestones alternating with various colored 
shales, some of which are yellowish-gray in color, corresponding 
in lithological appearance, and containing a fauna similar to the 
Cottonwood shales, while others are olive and reddish in tint 
and non-fossiliferous. Interstratified are shaly limestones and 
dark gray hard limestones which contain an abundant Lamelli- 
branch fauna. Numerous exposures of this formation occur in 
Chase county along the Cottonwood and its branches, and also 
to the northeast in the Neosho valley in Morris county. On 
account of the excellent exposures of this formation in the 
Neosho valley and its tributaries extending from three miles 
northwest to six miles southeast of Council Grove it is proposed 
to call this mass of rocks the Neosho formation. In the vicinity 
of Council Grove there are good exposures in the steep hills 
near the city and especially along Elm and Four Mile Creeks» 
which are western branches of the Neosho River south of Council 
Grove. 
Geologic section of the Neosho formation.—In Chase county 
there are good exposures of this formation at the following local- 
ities: on ‘Crusher Quarry Hill,” one and one-half miles west of 
Strong City ; on the western side of the Cottonwood River oppo- 
site and above Clements; on Buckeye Creek, south of Cotton- 
wood Falls; on Rock Creek, west of Bazaar; and on South Fork 
of the Cottonwood River, near Matfield Green. The Crusher 
Quarry Hill affords a good section of this formation ; the Cotton- 
*Published by permission of the Director of the United States Geological Survey. 
764 
