15 
III# Section at Mineral Point, 
Debris of limestone, containing Strep- 
telasma corniculura Hall and a few Orthis 
perveta Conrad . ------------ 
Compact, fine-grained magnesian lime¬ 
stone. --------------- 
Feet# 
3 
2 
THin, wavy- bedded, glass rock-like lime¬ 
stone. Orthis tricenaria Conrad, 0 
i m ■■■ ■ -r-~ »»—-• .. . 
defl e dta Conrad, Rafinesquina alternate, 
Conrad, Raf inesjui na minnesotensis Ulrich, 
Zygospira , Strophomena troutonersis 
Winchell and Schuchert , Rhynchotr ema 
inaequivalvis Castelnau, Isooe-i ns pb^a^ 
Dels ay, Mor iotrypa magna Ulrich - - 
j 
Coa.rser, thick-bedded dolomite 
Unexposed, 
v - 
Sand st one 
•, j ■■ . 
. . , 
25 
14 
6 
10 
Total 
60 
