9G <'. S. PROSSER — DEVONIAN AND SILURIAN ROCKS. 



west of north of Norwich. This well begins in the lower half of the 

 Hamilton stage at an altitude of probably more than 1,200 feet, and 

 was drilled to a depth of 1,889 feet, terminating near the bottom of the 

 Onondaga Salt group. 



SECTION OF THE MORRIS VILLE WELL.* 

 Approximate altitude, 1,200 (?) feet. 

 Depth. Thickness. Kind of rock. Formation. 



Feet. Feet. 



340 31+ Pure argillaceous black shale with 



brownish-black streak Marcellus shale. 



371 93 Dark and light gray limestone, which 



effervesces very strongly in cold II CI. Upper Helderherg (Cor- 



niferous) limestones. 

 Place of Oriskany (?). 

 404 180 Dark gray limestone, mixed with 



some quartz grains, which are prob- 

 ably from the Oriskany sandstone 

 above. The dark gray strongly calca- 

 reous limestone continues clown to 

 028 feet, where a very light gray calca- 

 reous sample was obtained. At 578 

 feet a pocket of gas was struck which 



burned for a short time Lower Helderberg. 



050 125 fA dark gray limestone, which effer- 



vesces more slowly in cold IIC1 than 

 the samples above, and leaves a large 

 residue of argillaceous material ; gas 



in small amount at 755 feet Onondaga Salt group {'!). 



775 185 Mainly dark gray limestone, but alter- 



nating with light gray to drab lime- 

 stone ; effervescence usually moder- 

 ately strong in cold HC1, leaving large 



residue; frequently grains of selenite . Onondaga Salt Group. 

 900 58 Greenish-gray shale, which has a slight 



effervescence in cold HO " 



1,018 5 Chocolate-colored shale; slight efferves- 

 cence in warm HC1 



1,023 87 Greenish shale; slight effervescence in 



warm HO 



1,110 09 Dark gray to blackish marlite, which 



effervesces quite readily in cold li( '1 . " 



*Thiswell was described l>y Prosser in Proc. Am. Assoc. Adv. Sci.,vol. xxxvi. 1887, pp. 208, 200. 



■f-The sample from 619 feet is a dark limestone, [earing a considerable argillaceous residue, with 

 some grains of selenite (?), and hears a strong resemblance i" the upper part of the ' >nondaga Sail 

 group. However, the light colored, strongly calcareous sample from 628 feet makes it appear 

 probable that it is better to consider the Onondaga Salt group as beginning at about C50 feet. 



