20. WHEATFIELD TOWNSHIP. F 2 . 395 



bed almost constitutes a thin coal seam. Above this hori- 

 zon the fossils, which in this part of the county characterize 

 this lower division of the Catskill, and which are described 

 elsewhere have not been found. It is convenient therefore, 

 as a sign of a palseontological not less than of a strati- 

 graphical break. 



The only part of Wheatfield township containing the 

 Middle and Upper Catskill is this southwestern corner 

 where Pine hill passes through and forms, for a short dis- 

 tance, its border line. There are several good sections ex- 

 posed along the creek from Dellville down to the head of 

 the '"Loop." At the latter place a complete anticline on 

 a small scale is shown. The presence of several of these 

 in this broad outcrop of the Catskill rocks proves the diffi- 

 culty of estimating or measuring the thickness of the group 

 in this part of the county. 



Copy of an old map of the Susquehanna river. 



The accompanying copy of an old map of the district of 

 which Perry county forms a portion seems worthy of a 

 place in this report, though not geologically connected with 

 the subject. For the original I am indebted to the kind- 

 ness of the Hon. C. H. Smiley, of New Bloomtield, who, I 

 believe, obtained it from Dr. Egle, of Harrisburg. (Plate 

 XLYII.) 



The surveyor's knowledge evidently diminished rapidly 

 from the southeast toward the northwest. In the former 

 quarter the map is fairly correct. In the latter it is difficult 

 to recognize many of the features of the country. 



An Indian town stood on the site of Harrisburg. The 

 Blue mountain and one range of the Cove mountain are de- 

 lineated. Duncan's and Haldeman's island, at the mouth 

 of the Cheniaty, (Juniata,) are easily identified. The 

 northern ma}^, however, represent Clemson's island opposite 

 Halifax. But further north the distances are contracted 

 and numerous conspicuous objects omitted. The figures, 

 however, seen intended to correct this disproportion, and 

 if the number 70 expresses the miles from the Swatara to 



