356 GEOLOGY OF EASTERN WISCONSIN. 



5. White, rather soft, granular crystalline doiomite, of more even tex- 



ture than the above, and better suited for cutting. Weathers smooth. 



In layers of 10 to 13 inches , 2 ft. 11 in. 



6. Tnin, regular bedded, white, granular crystalline, rather soft, some- 



vrhat shaly dolomite, in layers from 3 to 9 inches in thickness, par- 

 tially concealed 3 ft. 9 in. 



7. Pure, opaque white, saccharoidal dolomite, of medium hardness and 



even texture, weathering comparatively smooth. In layers of 13, 



16, 17, 36, 16, and 10 inches, which occasionally unite or subdivide. 9 ft. 



8. Granular crystalline dolomite, of medium hardness, somewhat un- 



even texture, white and pale orange color, mottled and mingled. 



Layers not always well defined 6 ft. 6 in. 



Total 48ft. 2 in. 



At Cato Palls, on the Manitowoc river, thinner and more homogeneous beds, belong- 

 ing to a higher horizon, appear in undulating stratification. At Clark's mills, two 

 miles below, similar thin beds, in broken ledges, form a wall along the bank of the river, 

 rising from 10 to 15 feet in hight, and are characterized by abundance of corals of the 

 genus Favosites. Near the old mill, a short distance below Clark's mills, on the left 

 hand side of the river, occurs a slight outcrop, the top of which is very cherty, and con- 

 tains silicified fossils, the most conspicuous of which is the remarkable Cyathophylloid 

 coral, Amplexus fenestratus, n. sp., which attains a foot or more in length, and two or three 

 inches in diameter. A short distance down the river, from 20 to 25 feet of impure, brec- 

 ciated limestone is overlaid by about 12 feet of cherty rock containing the above men- 

 tioned coral, the whole, from its hardness, giving rise to the rapids. It is worthy of 

 note that these two localities are the only ones at which the above fossil has been found. 

 South of the Manitowoc river, the formation is overlaid for a considerable distance with 

 the glacial accumulations of 'the Kettle Range, and effectually concealed from observation. 



In Sees. 2 and 11 of the town of Ashford, Fond du Lac county, the railroad exca- 

 vations again bring the formation to our notice. In the former section, the rock is a 

 soft, yellowish dolomite of irregular texture and bedding, and is specially interesting for 

 the variety, abundance and peculiarity of its fauna, as will be seen by Deference to the 

 table. The cut in Sec. 11 presents a rock whose lithological characters are not essen- 

 tially different from the preceding, but which contains a very great abundance of Penta- 

 merus oblongus, in great variety of size and form, and an almost entire absence of the 

 fossils which characterize the preceding location. At the village of Elmore, in the same 

 township, a quarry exhibits a heavy bedded rock of much more firm and homogeneous 

 texture, the sole, but abundant, fossil of which is Pentamenis oblongus, in unusually largo 

 and fine specimens. 



In the N. W. ^ of Sec. 6, in the town of Kewaskum, at Kuhn's quarry, is a porus, 

 granular, crystalline dolomite, containing an abundance of Favositoid corals and Penta- 

 tnerus oblongus, and probably represents the horizon of the Lower Coral beds. South- 

 ward from this point, the formation is lost under the Kettle Range, and we do not again 

 rec it, or what may be supposed to be its equivalent, until we reach the vicinity of Pe- 

 waukee. On the Sheboygan river, at the village of Roekville, there is a slight expos- 

 ure of the upper portion of the Upper Coral beds, presenting a more than usually dark 

 gray color, with more or less of chert, and containing but very few fossils. The drift 

 in the vicinity, however, is prolific in those species which are so abundantly present far- 

 ther to the north. 



