REPORT OF THE STATE PALEONTOLOGIST 1902 1007 



being 'found among them. In the face of the Upper falls are 

 77 feet of flags and shales, and a layer of rather hard blue 

 shale 4 feet thick exposed in the river bed for a few rods above 

 the falls is taken as the top of the Gardeau shales and flags. 



In the 262 feet of strata between the " Table rock " and the 

 top of the Gardeau beds, changes in the sedimentation are very 

 frequent. Layers of black, blue black, blue gray and olive 

 shales, and blue or olive sandstone, usually but a few inches 

 thick, succeed each other in irregular order, but there is a 

 noticeable increase upward in the sandy layers, and in the face 

 of the Upper falls they equal or exceed the shales, though there 

 are no heavy compact layers. 



Portage sandstones. The Portage sandstones consist of 187 

 feet of strata exposed in the walls of the gorge above the Upper 

 falls, from the top of the 4 foot shaly layer at the crest to the 

 top of the cliff on the east side south of the high railroad 

 bridge. 



Except a bed of hard blue shale, containing calcareous nod- 

 ules, 2 feet thick, 12 feet above the base and a layer of similar 

 character 6 feet thick and 52 feet 

 higher, the entire formation is com- 

 posed of light bluish gray sandstone in 

 layers from 2 feet to 10 feet thick, 

 separated by ^ inch to 6 inches of 

 shaly matter. 



In some of the upper layers the sand- 

 stone is compact, durable and valuable 

 for building purposes. Other layers 

 are schistose along the laminae, and a 

 few are shaly and friable. Large ob- 

 scurely defined concretions occur in one 

 or two of the more calcareous layers, 

 but they are few. 



The two beds of shales and the shaly 

 partings between the layers contain a 

 very few fossils, all like those below. 



In the sandstones Fucoides v e r - 

 t i c a 1 i s is common, and plant remains occur, but otherwise 

 they are practically barren here and along Wolf creek below 



1L 



i.4m 



flags 



shales 



flags and 

 shale 



sandstone with 

 Chemung fossils 



dark shale 



Fig. 6 Section at Long Beards 

 riffs. Station 13 



