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Geology-Mineral District

Limestone" and which constitutes the hills surrounding the City of Cincinnati, [and which] it is considered by most geologists as the equivalent of the "Trenton Limestone" of the New York Geologists, but which Mr. Halls thinks it belongs to a more recent period.

All the rocks of this District are referable to the "Champaign Division", which is the first or oldest of the transition rocks in the United States.

III. The third Geological District is that [what is] known, (and very properly) [known] as the "Mineral Country" the word mineral being used [in this country] here to denote an ore of some useful metal. The lead bearing rock is a loose porous yellowish limestone, resting upon the "Blue Limestone" and is deemed equivalent to the "Cliff Limestone" of Dr. Locke in Ohio, and the "Niagara Limestone" of the New York Geologists.**

It is therefore the Geodiferous limestone of the late Prof. Eaton, a name which ought to be restored as having been first applied to this rock, and being at least as free from objections as either of [these that have recently been applied to it]. the others [crossed out].

Above the geodiferous or lead bearing rock we find in this district the corniferous rock of Eaton constituting the [Mound] throughout the Mineral district and known by [its] the [immense] quantities of chirt or flint, or "quartz formation" which it contains.

(This is not a note but part of the text)