IOWA ACADEMY OP SCIENCES. 
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and Kirk.* While it was not formally nor properly defined as 
a formation name subsequent description f leaves practically no 
doubt as to its extension. The name had been previously used 
by Jenney for the lead- bearing formations of the Mississippian 
series of southwest Missouri but only incidentally, and before 
it was proposed formally to use the titlej thus, the term had 
been appropriated in another sense. Moreover, Cherokee, as 
applied to the lead-bearing rocks, covers an indefinite sequence 
of beds for which specific titles that are not well defined have 
been already adopted, so that even if the term in this sense had 
been formally suggested it could scarcely be considered as hav- 
ing priority. In this sense also the term has nowhere been 
accepted as a geological name, while it has been practically 
refused recognition by all who have had occasion to refer to it, 
either directly or indirectly. 
The Cherokee contains a number of minor formations to 
which special names are applicable locally. These require no 
definition. They refer more directly to the coal seams, and 
thick sandstones. 
Henrietta Limestone.~~^h.Q name Henrietta was used by 
Marbut§ for a subdivision of the coal measures which gives 
rise, in southwestern Missouri, to a prominent physiographic 
feature called the Henrietta escarpment. It consists of several 
limestone beds of great persistency separated by shales, but 
presenting a sharp contrast to the underlying and overlying 
formations which consist of shales and sandstones. 
In southeastern Kansas it embraces of Swallows sections! 
essentially numbers 203 to 217, or from the top of the Pawnee 
limestone do wn to the cement rock under the Fort Scott lime- 
stone. In the more recent references! to these beds the same 
limestones are recognized but the lower bed is termed the 
Oswego limestone. 
The Henrietta formation, in southwestern Missouri and south- 
eastern Kansas at least, is a three fold division, having an 
upper and a lower limestone separated by shale thirty to fifty 
feet thick and carrying thin beds of limestone. 
To the lower or calcareous number the term Fort Scott lime- 
stone is properly applied. This is the name used by Swallow, 
^Kansas Univ. Quart , vol. II, p. 105, 1894. 
+Univ. Geol. Sur., Kansas, vol. J, p. 150, 1896. 
4;Trans. American Inst. Min. Eng., vol. XXII, p. 171, 1894. 
§Missouri Geol. Sur., vol. X, p. 44, 1896. 
II Kansas Geol. Sur., Prel. Rep., pp. 34-25, 1866 
^University Geol. Sur., Kansas, voL I, p, 151, 18S6. 
