Peossee and Cumings — Lower Silurian Sections. 



627 



vertical "with an average height of over one hundred feet,"* and does not 

 give the thickness of the section. An earlier and quite accurate estimate vi -as 

 made by James Renwick, who briefly described the geology in a paper read 

 in November, 1824, saying: "The river has worn itself a passage through the 

 rock for the distance of nearly two miles, forming a series of water-falls, and 

 has thus laid open to view the strata to a depth of probably 300 feet. 11 f 



The Newport Sections. 



In Newport township, some eight miles southeast of Trenton Falls, are 

 interesting exposures of the Calciferous sandstone, Birdseye and Black river 

 limestones. One of these is along the western bank of West Canada creek 

 and the cut of the Adirondack railroad, two miles above Newport village, and 

 one and one-half miles below Poland. At this locality the railroad is near 

 the bank of the creek and the cut is about 150 yards north of the fifteenth 

 mile-post. This section was described by Mr. White under the title of the 

 " Poland lime kiln section, No. 130 A." $ 



Section of the Newport Railroad Cut. 



Along the bank of the creek and at the southern end of the railroad 

 cut is the following section : 



XL IX B 1 . Nearly opposite the fifteenth railroad mile-post, in f?f* 

 the bed of the creek and exposed about one foot above the level of the 

 water, is a heavy stratum of calcareous sandstone. The lithologic character 

 of this rock is like the Calciferous sandrock, to which formation it is referred. 

 An analysis of a specimen, from this stratum, by Mr. Edward P. McKeefe, 

 of Union College, gave the following result : 



Si0 2 ...... 74.37 percent. 



Fe 2 3 7.49 " 



CaC0 3 15.75 " 



MgC0 3 2.28 



99.89 per cent. 



D 2 . Transitional layers from the Calciferous sandrock to the n^ 6 ! 1 ^ 

 Birdseye limestone. Thickness not accurately determined on account of the 

 high water. The upper six feet of this zone are composed of two layers of 

 impure limestone which are conspicuous in the lower half of the bank 



* Geology of New York, Part III, 1843, p 52. 



t Annals Lyceum Natural History, New York, Vol. I, Part I, 1824, p. 185. 



X Transactions New York Academy of Sciences. Vol. XV. April, 1896, pp. S2-84. 



