462 NEW YORK STATE MUSEUM 



section is 260 feet A. T. giving a difference of 800 feet which cor- 

 responds closely with the result obtained by the barometer. The 

 members of the Calciferous and Trenton stages of this section were 

 measured by Mr Darton with a somewhat different result from 

 that obtained by the writer.^ No. 2-15 of the present section were 

 measured very carefully with a tape. In Darton's section the 

 Birdseye is given as -above the Black river. There does indeed 

 seem to be a peculiar blending of the lithologic characters of the 

 massive member of the Trenton and the Black river in no. 8 

 and 9, so that there is not a sharp line between the two substages. 

 The Birdseye is well defined however in its proper stratigraphic 

 position, being sharply separated from the subjacent Calciferous 

 and less sharply but distinctly from the superjacent Black river. 

 The upper, thin bedded member of the Trenton substages is well 

 shown and seems to pass gradually into the Utica though the 

 faunal line between the two is distinct enough. The Utica shale 

 is exposed at intervals from Morphy's to the top of Adebahr hill, 

 a vertical distance of 740 feet. The distance from Morphy's to 

 the bench-mark on Adebahr hill is three miles, hence if the south 

 dip is 140 feet a mile the Utica in this section has an actual 

 thickness of 11 60 feet. 



The next exposure of Trenton west of Morphy's is at the Stan- 

 ton2 quarries a mile and a quarter east of Port Jackson. A section 

 at this quarry is as follows (45 1) : 



I* Dark blue limestone of somewhat crystalline 

 structure. i' 6''=i9' 



P Darker blue limestone containing corals 

 (S t r e p t e 1 a s m a), very massive and compact 3' 6"=iy^ 6" 



P Bluish drab, very compact, fine grained lime- 

 stone. Lithologic characters substantially those 

 of the Birdseye limestone. 2'=i4' 



V- Covered to level of West Shore railroad. I2'=i2' 



^ISth annual report N. Y. state geologist, p. 426, 427. 



'Vanuxem mentions this quarry in several places in his report. His description of 

 it is as follows: " The rock hase of the Trenton at Stantons is a very solid mass 

 with very few divisions or layers, of a light gray color and crystalline. Some of the 

 layers or portions are over 6 feet thick. The lower layer is nearly 7 feet thick, 

 the next 4, the upper about 2. The rock is of good quality with fewer knobs or 

 accretions than in some other localities and with more of the Birdseye character than 

 in the other quarries. The surface of the rock is water worn, being quite smooth in 

 some places, and scratched, the direction of the scratches nearly east and west." 

 {Geology of New York, pt 3, p. 44) and again " The upper mass of the Black river lime- 

 stone, of which the Birdseye forms the lower part embraces the greater part of the 

 gray limestonea at . . . Stanton's quarry at the east end of Port Jackson", (p. 250) 



