NIAGARA FALLS AND VICINITY 



115 



length of 1305 feet, is now preserved in the museum of the Buffalo 

 society of natural sciences, and from it the following succession of 

 strata can be demonstrated.^ 



Rondout 

 waterHme 



Salina 



■! 



Feet 



7 

 25 



5 

 13 



4 



2 



12 

 I 



4 

 7 



f Waterlime above the mouth of the well, about 

 i Shale and cement rock in thin streaks 

 I Tolerably pure cement rock 

 [ Shale and cement rock in thin streaks 

 Pure white gypsum 

 Shale 



White gypsum 

 Shale 



White gypsum 

 Shale and gypsum mottled 

 Drab colored shale with several thin layers of 



white gypsum 

 Dark colored limestone 

 Shale and limestone 

 Compact shale 



Gypsum and shale mottled and in streaks ap- 

 proximating 290± 

 The gypsum of this formation has never been mined in this dis- 

 trict, owing to the strong flow of water through these strata. No 

 salt beds are found in the SaHna of this region, though they are 

 characteristic of the formation farther east. Salt water is however 

 obtained. Fossils are very rare throughout these beds; none have 

 been found in the exposures on the Niagara river. 



58 



2 

 4 

 3 



I 



Rondout waterlime 



The Salina beds of this region grade upward into a magnesian. 

 limestone which contains a considerable amount of aluminium sili- 

 cate. The upper portion of this series, which in the Niagara region 

 has a thickness of about 50 feet, is very uniform in character and 

 suitable for the manufacture of hydraulic cement. In North Buf- 

 falo, extensive quarries have been opened in this rock by the Buffalo 



^Pohlman. Cement and gypsum deposits in Buffalo. Am, inst. min. eng. 

 Trans. Oct. iJ 



