mudrocks. 
THE EURYPTERIDA OF NEW YORK 
103 
These sections show that the Eurypterus-bearing black shales are in- 
tercalated in red and green shales with thinner beds of dolomites and 
The waterlime and shale occurrences of Eurypteri in these 
Salina beds are hence not expressions of different biologic facies. 
table. 
From wells of the neighborhood of the preceding locality the following section 
has been obtained by Sarle: 
Top 
I 
2 
Oo com An ff W 
4 
Oo 
Il 
I2 
13 
14 
15 
16 
17 
Red shale or marlite.. 2... eee cen 
Hard, fine grained, yellowish dolomite, having an imperfect 
conchoidal fracture.............0 cee aes ra 
Red shale.... 0... nee eee eee 
Break estimated at... 0... eee tee 
Dolomite like no. 2... 0 0. cee e enna 
Green shale or marlite 
Red shale 
Break estimated at about 
Green shale... 0... eee ee 
Black shale, very fine textured, fissile and with 1 inch dolomite 
parting (eurypterid horizon)........ 2.0... cee ee eee 
Green shale 
ed 
Poe ee ee ee Se ed 
rr ee ee 
Dolomite like no. 2 
eee @ © © © © @ © © © @ = © © © © 8» © @ © © 8B © © © 8s © 2» © © 2 & © © © © * 8 & 
Green shale or marlite.. 0... ee teens 
From west branch of Allen creek: 
Light colored waterlime, some pyrites and sun cracks,......... 
Pea-green shaly marlite... 6... . eee eee 
Niagaran 
An impure yellowish porous limestone ‘ 
Succeeded by an impure bituminous limestone made up of 1m- 
bricating, shell-like domes, etc. 
- The eurypterid fauna occurs in the black shale, nos. 8 and 1o in the foregoing 
Inches 
~I 
