GREAT BEND. G 5 . 91 



this same New Mllford lower sandstone is seen putting out 

 of the hill in a bold cliff, and forming a lofty prominence 

 450' above the level of the Susquehanna ; a magnificent 

 view of the Susquehanna valley is obtained from this posi- 

 tion, and the locality has been named by the inhabitants 

 ••Fort '76." 



The cliff has an elevation at base of 405' above Great Bend 

 depot (884',) and being 25' in vertical height is 1314' A. T. 

 at top. 



Great Bend Limestone. — Passing down to the Susquehan- 

 na river we find a thin calcareous layer filled with Chemung 

 shells at 400' below the base of the " Fort '76 " cliff or New 

 Mllford lower sandstone. The layer varies from \' to 2' in 

 thickness and sometimes disappears entirely. It occurs on 

 the land of Mr. Lusk, about 20' above the level of the Sus- 

 quehanna. Immediately below the shell rock come finely 

 laminated shales, on which the calcareous layer appears to 

 rest uncomformably in some places, through local causes 

 doubtless. Below these shales come sandy layers contain- 

 ing nuggets of siliceous iron ore, of various sizes from one 

 inch to a foot and a half in diameter. In the calcareous 

 layer were seen Streptorhynchits Chemungensis, Splrlfera 

 cllsjuncta, Rhynchonella contracta, Leioryhnchus New- 

 berrti, together with many other indeterminable forms of 

 well known Chemung fades. 



About two miles above Great Bend depot the Susquehanna 

 river flows through a narrow gorge, only 100 yards wide, 

 where it is hemmed in by vertical walls of outcropping 

 strata. The following section was obtained on its left at 

 this locality : (Fig. 16.) 



Two miles above Great Bend. 



1. Flaggy sandstone, 30' 



2. Shales, , 12' 



3. Sandstone, 6' 



4. Blue shale, 6' 



5. Flaggy sandstone to river level, 3 



About midway in No. 1 is a bed of shale 5' thick, and, it, 

 as also No. 2, contains many iron concretions. 



Indian pictures. — This locality is often termed "Red 



