CF K : > ‘Natural “Terraces and Ridges on Lake Erie. « e 
-’ Willdughby, ; : Peo atety : é - 85 feet. 
Seven miles east of Cleveland, . os 112tolls « 
aw Dhreg, 1 oe ay i) 308 oT Gabde dg. « 
[wo | ‘ ¢ at crossing of 2 * 198 « 
~ Cleveland and Pittsburg Railroad, —. : 
Cleveland city, 4 ‘ j 
Ohio Cit 
‘ ““ ‘ 
, 96tol08 “ 
‘ . 114 
Rockport, Rocky River, ie net oie. ae 
One mile west, . 7 , ; 105, 107 and 126 “ 
Avon, Lorain Co., east of Centre one mile, Bl #4 
* * =“ Centre sand knolls, . ’ lO“ 
‘Russelton, Lyme, Huron Co., i . ; é 12. My 
This table embraces a distance of one hundred and twenty 
(120) miles, where it appears the lowest summit is 85 feet,“ and 
the highest 145, showing a difference in longitudinal direction of 
0 feet. I have not visited all the positions here given, but the 
greater part of them, and for the rest am informed by the engin- 
eers that there is no higher ground between the ridge and the 
Lake. In all cases there is a smooth uninterrupted plain, on the 
Lake side, over which the water of the Lake is everywhere visi- 
ble, when the forest timber, which is heavy, is cleared away. It 
1S variously composed of blue marly clay, of coarse drift called 
“blue” and “yellow hardpan,” and of coarse sandy and gravelly 
drift; but the soil is for the most part clayey, and wet between 
and below the ridges. The streams, little and great, cut deep 
and steep gullies through the superficial deposits, and also into the 
rocks below. From the cliff limestone at Sandusky, eastward 
and to the state line, the superficial matter rests on slates, sand- 
Stones and shales, corresponding to the Hamilton, Chemung and 
Portage groups, of the New York Reports. 
Elevation of the second Ridge, called the “ South” and 
“ Middle” Ri 
Ridge. 
_ Near Kingsville, Ashtabula County, (south ridge,) 152 feet. 
Centreville, . ‘ ; : ‘ * a Ak 
Two miles gast of Cleveland, 1 § eee 
Two miles southwest of Ohio City, middle “ . 149 “ 
Dover Centre, 12 miles W. of Cleveland, “ EC loa 
_ frocKport, 7 miles 3 ci ‘cs ée 130 * 
Ridgeville, Lorain County, abt Madd igen Ble 
tht e is more broken and less continuous than the first, 
or “north ridge,” and is in general heavier. In Rockport, Dover 
and Ridgeville, on the northern or Lake slope, it is from 16 to: 
feet above the base at its foot, and on the rear 5 to 10 feet. = 
hind it, as with all the ridges, is flat, swampy land, and small 
Fivulets that drain the low ground, running parallel with the 
Szconp Szrms, Vol. X, No. 28—July, 1850. 5 
