MUSKINGUM COUNTY. 241 



localities in Washington township a bed of iron ore is seen about fifteen 

 feet below this coal. Its area is not extensive. 



Coal No. 5 is local in its development, appearing^only in Washington 

 township, and exhibiting great variations in thickness. It is most im- 

 portant near the Central Ohio Railroad, and thins out rapidly northward, 

 disappearing about twelve miles north of Zanesville. 



Coal No. 4 is a persistent coal, though varying greatly in thicki^ess. 

 Wherever seen in Monroe, Adams, Cass, Jackson, Muskingum, and Madi- 

 son townships it is a cannel, but js of no value, except at one locality in 

 Jackson township. It is interesting, especially^because of its relations 

 to No. 6. In Monroe township it may be traced along White Eyes Creek 

 from near Otsego to Johnson's Mill, twenty inches thick, and about forty 

 feet below No. 6. It is every where known as the "limestone coal," but 

 the limestone is not persistent along the outcrop. Tracing it down Wills 

 Creek, the interval between the coals is seen to increase, until, at Frew's 

 Mills, it becomes ninety feet. At the salt works, near the Coshocton 

 line, it is the same ; near Dresden, one hundred feet ; on the north 

 branch of Symmes Creek, eighty feet ; and near Morton's coal works, on 

 the Muskingum, one hundred and ten feet. In Liberty township, Guern- 

 sey county, it becomes twenty feet. These variations afford an excellent 

 illustration of the doctrine, long since established, of unequal subsidence. 

 The gray limestone overlyine; this coal is coarse-grained, sometimes 

 shaly, but usually compact, having a fracture like sandstone. It con- 

 tains great numbers of Spirifer lineatus. 



Coal No. 8 and its associate limestone are duplicated in this portion of 

 the county. The coals are thin and of no value. The limestone is vari- 

 able, in some places pure and ringing when struck, at others quite earthy. 

 The fossils are ordinarily perfect, and are very numerous. With the 

 upper limestone is a flint, gray to black in color, and very irregular in 

 quantity and mode of deposition. It occasionally replaces the limestone 

 and becomes three feet thick. In' Jackson township it is associated with 

 an important bed of iron ore. It contains numerous remains of mol- 

 lusca, which, for the most part, are badly preserved. 



Coal No. 2 is thin and of no economical value. 



Coal No. 1 was seen only in Licking and Jackson townships. It is 

 variable in thickness, but yields a coal of very superior quality, appar- 

 ently free from sulphur. Where accessible it is too thin to be of much 

 economical value, but in some almost inaccessible localities it expands to 

 four feet. 



The strata below this coal were observed only in Jackson township,, 

 and will be found fully described under that head. 

 16 



