THE KIMMSWICK AND PLATTIN LIMESTONES 
183 
the so-called Kimmswick section of Ralls County. The localities 
at Sugar Creek and at McCune Station, in northern Pike County, 
evidently belong to the same Hormotoma (?) major horizon. This 
Hormotoma major zone is the McCune of Keyes, when this term 
is used in a restricted sense. 
The top of the so-called Kimmswick limestone section along 
Sanders branch is formed by a finer grained limestone containing 
an occasional poorly preserved Madurina and other fossils known 
also in the underlying strata. It is overlaid by 5 feet of yellow- 
ish clay, followed by 10 feet of fine grained Devonian limestone, 
an unexposed interval of 7 feet, 6 feet of Devonian sandstone, 
and a considerable thickness of fine grained Devonian limestone, 
of which only the lower part is exposed at the locality in question. 
At the W. H. Bowles locality, only the top of the Kimmswick 
is exposed, overlaid by 2 feet of yellowish clay shale, 15 feet of 
calcareous shale, probably Devonian, and 15 feet of undoubted 
Devonian limestone. The chief interest at this locality was the 
presence of a small Cydocystoides near the top of the Kimms- 
wick limestone. 
At Hagan’s shop, also at three-fourths of a mile east of Shiel, 
and at a locality a mile northeast of Spalding Springs, all three 
localities being located along the northwestern line of outcrop of 
the so-called Kimmswick in Ralls County, Missouri, Pledam- 
honites gibbosus occurs in the upper part of the Kimmswick sec- 
tion. The Pledambonites gibbosus horizon is regarded as above 
that of the typical Hormotoma (?) major zone. 
11. CORRELATION OF RALLS AND PIKE COUNTY KIMMSWICK WITH 
STRATA ELSEWHERE 
It has been noted already, on a preceding page, that the strata 
forming the lower half of the so-called Kimmswick section along 
Sanders branch may be correlated with those strata south of 
Thebes, Illinois, which were regarded by Savage as of Kimmswick 
age. A considerable part of the fossils in these strata occur also 
in the Prosser of Minnesota, although this may not involve, 
actual identity of horizons. 
