374 GEOLOGY OF OHIO. 



few feet. At a point one mile east the well of Mr. Lawrence Sader, sit- 

 uated at his brick and tile establishment, met the Niagara after passing 

 through fourteen feet of brown and blue clay. 



In Portage township the Niagara may be seen in section 6, on Mr. 

 Fuet's land, and at Portage, N. W. \ section 7. At the latter place it is 

 slightly quarried near the public school-house. A well dug at Portage, 

 on Mr. Louis Dinest's land, happened to strike a crevice in the rock two 

 feet in width. The overlying Drift was eighteen inches. This crevice, 

 upon removing the Drift, furnished water at the depth of six and a half 

 feet from the surface. 



The Salina. — On the eastern slope of the Niagara anticlinal, in Ottawa 

 and Sandusky counties, the Salina is met with, but in a very reduced 

 condition. It is represented by a green shale, which is not more than a 

 foot in thickness, and is altogether wanting south of Sandusky county. 

 In the north-eastern part of Ottawa county it has a thickness of at least 

 thirty feet, and contains the white gypsum exported from Sandusky. In 

 Wood county the junction of the Niagara and Waterlime has not been 

 observed, and nothing is known concerning the existence of the Salina 

 west of the Niagara anticlinal. 



The Waterlime in Wood county has the three lithological phases de- 

 scribed in giving the geology of Ottawa county. 



1st. It is a coarse, brecciated limestone, without distinct bedding or 

 stratification; often massive ; sometimes vesiculated, even cavernous; of 

 a dull gray or drab-gray color, and almost destitute of fossils. In this 

 condition of the Waterlime there are small, irregular patches of fine, 

 hard, and close-grained rock, with thin laminations of alternating light 

 and dark drab, running in wavy lines sometimes quite perpendicularly, 

 but often at angles constantly changing. Such rock is heterogeneously 

 mingled with loose-grained, vesicular rock, of a lighter color, which, by 

 crumbling under the influence of the weather, gives the whole mass a 

 cavernous appearance. 



2d. It is a- coarse but even-grained, thick-bedded, and magnesian lime- 

 stone, of a dirty buff color, soft and easily wrought ; a very useful stone 

 for building where it can be found in sufficient quantities. 



3d. It appears very frequently as a thin-bedded, drab, close-grained 

 limestone, the layers of which are uniformly separated by bituminous 

 films. This character of the Waterlime is subject to sudden and inex- 

 plicable changes of dip. The beds, which are usually about three inches 

 thick, are sometimes not more than half an inch. It most frequently 

 shows the characteristic fossil Leperditia alta, although it has also been 

 found in No. 1. No. 2 has as yet afforded no fossils, so far as known. 



