CARBONATE ROCKS. 199 
I. Iron carbonate, NW. 4 sec. 18, T. 47 N., R. 45 W., Michigan. Analysis by 
Chatard, No. 895. 
J. Iron carbonate, Penokee iron range, NE. } sec. 6, T. 45, R. 2 E., Wisconsin. 
P. BR. C. 999. 
K, L. Black, slaty, carbonaceous iron carbonates, Animikie formation, Kakabikka 
Falls, Kaministiquia River, Canada. 
M. Iron carbonate, west end of Gunflint Lake, Minnesota. 
N. Iron carbonate, north side of Gunflint Lake, Minnesota. 
O. Iron carbonate, north side of Gunflint Lake, Canada. 
Analyses, J, K, and L by R. B. Riggs, record Nos. 376, 377, 378; M, N, and O by 
T. M. Chatard, record Nos. 897, 898, 900. Rocks M, N, and O are described by 
Clements in Mon. XLV, p. 380. 
P. Ferrodolomite, Marquette district, Michigan. Analysis by George Steiger, 
record No. 1473. P.R. C. 994. 
Q. Ferrodolomite, Marquette district, Michigan. 
R. Portion of Q insoluble in hydrochloric acid. 
8. Soluble portion of Q. 
Analysis Q, R, and S by George Steiger, record No. 1442. These analysesare not in 
the monograph cited. 
