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.1 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 1160 feet. 
The next exposure of Trenton west of Morphy’s is at the Stan- 
ton” quarries a mile and a quarter east of Port Jackson. A section 
at this quarry is as follows’ (451): 
I* Dark blue limestone of somewhat crystalline 
structure. a ce ec 
I’ Darker blue limestone containing corals 
(Streptelasma), very massive and compact gaia pet OM 
I? Bluish drab, very compact, fine grained lime- | 
stone. Lithologic characters substantially those 
of the Birdseye limestone. berets 
I! Covered to level of West Shore railroad. FW geen! bo 
113th 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 base 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 limestones at . . . Stanton’s quarry at the east end of Port Jackson’’. (p. 250) 
