492 GEOLOGY OF OHIO. 



stone is seen on the north side of March Run Hill, toward the foot of the 

 hill. If this limestone continues eastward to Duck Creek with the usual 

 dip, it would appear on Duck Creek at Stanleyville. The same Stanley- 

 ville limestone is seen on some of the eastern tributaries of Duck Creek. 

 On Killwell Run, on the farm of Lewis Dowling, the limestone is well 

 seen. Here the following section was taken : 



Ft. In. 



1. Chocolate-colored shale, with coal plants. 



2. Sandstone 3 6 



3. Slate, blue and brown 6 



4. Sandy, calcareous nodules .. 6 



5. Shale 5 



6. Coal 6 



7. Clay 5 



8. Coal, .' 10 



9. Fire-clay 3 6 



10. Sandy shale 6 



11. Sandstone '. 6 



12. Blue clay 1 3 



13. Limestone, not measured, probably 10tol2 



Bed of stream. x 



Passing over the ridge to the south-east into Lawrence township, we 

 find on Little Eight-Mile Run, about a third of a mile from its mouth, a 

 similar body of limestone. The "sandstone seam" is found at Guyton's 

 Mill, at the mouth of Little Eight-Mile Run, on Little Muskingum, un- 

 der the heavy sandrock. No measurement was made of the interval, but 

 I should think the limestone to be about fifty or sixty feet above the 

 "sandstone coal." These observations would tend to verify the other. 



MARIETTA TOWNSHIP. 



This township is situated on the Ohio River, and embraces within its 

 limits the mouths of the Muskingum and Little Muskingum rivers and 

 Duck Creek. The shape of the township is such as to give a very large 

 frontage on the Ohio, and, consequently, a large area of the rich soil of 

 the immediate valley. The valleys of Duck Creek and Little Mus- 

 kingum are much narrower. The township is generally hilly, as are 

 almost all townships bordering on the Ohio River. The city of Marietta 

 is built in part upon a Drift terrace, and in part upon the alluvial 

 ground bordering the Ohio and Muskingum rivers. The terrace is a high 

 and beautiful one, affording a dry soil, and is admirably fitted to be the 

 site of a town. Terraces of about the same level are seen upon the 

 opposite side of the Muskingum, a mile and a half above Harmar, and 

 on the West Virginia side of the Ohio. A very extensive terrace is 

 found in the upper part of Marietta township, above the mouth of the 

 Little Muskingum River. All these terraces tell a tale of very high 



