Geology of New-York; Part III comprising the survey of the third geological district Volume 3

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1842 edition. Excerpt: ...being well characterized Seneca limestone, and the Linear strophomena very abundant No. 5. Lower part of the Marcellus shales, with interrupted beds of dark impure limestone; the calcareous material in too great abundance to form septaria, and in too small quantity for regular layers. The upper part, marked by narrow lines, represents two layers of similar limestone, with goniatites and large orthocerae, with here and there a little white lamellar carbonate of lime and some orangecolored carbonate of iron. No. 6. The upper part of the Marcellus shales, the part which through Madison and Onondaga is of considerable thickness, and without fossils so far as was noticed. These shales form the surface mass for some extent in that section, but are covered with alluvion. The best locality where the shales, and the Hamilton group, the next mass in succession, may be seen in immediate connection, is at Cherry-valley, in the brook which passes by the ashery southeast of the village. The water falls from the Hamilton group, passes over the shales, and upon the surface of the upper layer of the Corniferous limestone, the latter forming the bed of the brook near the ashery. Ludlowville is a highly favorable point for the examination of the masses 1, 2, 3, the village being placed in the centre of them; and were they grouped together, no name could designate them more appropriately than that of the village itself; and its interest is greatly increased by the undoubted fact that the two lower, if not all three, belong to the Ludlowville group of the British Silurian system, names which we would gladly adopt, were not those which we use, more accordant with the facts of the geology of this State, where the limits are better denned; and besides there is an...