TULLY WELL AND SECTION. 105 



from one of these wells. The well is the one known as No. 2 of the D 

 group, which is about two and one-half miles northwest of Tally village, 

 from which samples were saved from every ten feet of depth. 



SECTION OF THE TULLY WELL, NUMBER 2, D GROUP. 



Approximate altitude. 815 feet above tide* 

 Depth. Thickness. Kind of rock. Formation. 



Feet. Feet. 



30 420 Mainly blue argillaceous shale, which 

 is slightly calcareous and some of it 

 rather arenaceous ; from 410 to 450 feet 

 slightly blackish shale with brownish 

 streak alternating with blue argillace- 

 ous shale Hamilton. 



450 110 Mainly very black argillaceous shale 



with brown streak Ma reel 1 us-. 



560 260 Bluish shaly limestone ;' strong efferves- 



cence in cold HC1 ; also light and dark 



gray limestone ; fragments of fossils . . Upper and Lower Hel- 



derberg. 



820 255 f First bluish-gray, shaly limestone, 



which has very slight effervescence in 

 cold HC1, then mainly dark and light 

 gray limestones, which have a stronger 

 effervescence in cold HC1, especially 



the light gray chips Onondaga Salt group(?). 



1,075 40 Rock-salt Onondaga Salt group. 



1,115 Last sample % 



Fulton Well and Section. — In the winter of 1887-'88 a test-well was 

 drilled at Fulton, Oswego county, New York, and through the kindness 

 of Dr George A. Edwards, of Syracuse, New York, a set of samples was 

 furnished me for study. Fulton is about twenty-three miles north-north- 

 west of Syracuse, and the altitude of the mouth of the well is approxi- 

 mately 287 feet above tide. || 



♦According to Mr G. E. Francis. 



fNo indication oi the Oriskany sandstone appears in the samples; consequently it is impossible 

 to indicate any dividing line between the upper and lower Helderberg limestones. In the same 

 way the dividing line between the lower Helderberg and the Onondaga Sail group is not clear: but 

 it has been taken provisionally at ihe point where a bluish gray magnesian limestone appears in 

 considerable thickness. 



X Dr Englehardt reported that this well reached the rock-salt at a depth of 1,075 feet, and that the 

 stratum was 4:; feet in thickness (Advance sheets of Dr. Englehardt's Rept. to the Supt. Onondaga 

 Salt Reservation for 1890, p. 8). 



||Altitude estimated by Mr Thomas D.Lewis from the number of locks on the Oswego canaJ 

 between Fulton and Lake Ontario. 



