160 
Processes producing the magnetite, 
70 
Putnam, B. T., report on iron-ore 
mines of New York, 12; quoted, 
76, 80, 85, 87, 97, 99, 107, 108, 109, 
112, 113, 115, 118, 122; mentioned, 
16, 88 
Putnam county, ore bodies, 6, 8, 13, 
19, 41, 45, 70, 110; isolated de- 
posits, 47, 121 
Ramapo Ore Company, 75, 84, 94, 
96; acknowledgments to, 6 
Rattlesnake mine, 44, 99; description, 
106 
Raynor mine, 45; description, 98 
Red-back belt, 44, 63; description, 87 
Red-back mine, 49, 57, 63, 66, 75, 84 
Rees, ‘Charles, acknowledgments to, 6 
Replacement, evidence for, 72 
Reservoir granite, 28, 54 
Rice, Marion, mentioned, 10, 31, 38, 
39, 52, 53, 62 
Ries, Heinrich, quoted, 19, 95; men- 
tioned, 19, 32, 50, 95, 102, I10 
Ringwood, N. J., 33 
Ringwood mines, 22 
Rockland county, 6 
Rogers, G. S., quoted, 26 
Rogers, Henry D., quoted, 9, 23; 
mentioned, 59 
Rolls, 33, 62 
Ruedemann, Rudolf, mentioned, 35, 
45 
Ruttman, F. S., quoted, 16, 57, 121; 
mentioned, 19, 36, 65 
Sackett mine, 20, 46; description, 
112 
Sandy Hook, N. J., 7 
Schists, 7 
Scott-Cook-Augusta group, 33 
Scott group, 43, 61, 63, 90-96; plan 
and cross section, fig. facing p. 90 
Scott mine, 36, 64, 72, 74, 90, 96; 
description, QI 
Sederholm, J. J., mentioned, 70, 95, 
112, 120 
Shaler, N. S., quoted, 119 
NEW YORK STATE MUSEUM 
Shoots, 55 
Slip-zone, 78 
Sloatsburg, 6 
Smith mine, 43, 75, 90; description, 
04 
Smock, J. C., quoted, 11-12, 
mentioned, 19, 34, 88, 118, 122 
Smythe, ‘C. H., mentioned, 59 
Snake hill, 34 
Sparta, N. J., 8 
Spencer, A. C., quoted, 23, 24, 25, 
29; mentioned, 50, 70 
Sprout brook group, 20, 46; descrip- 
tion, 115 
Sprout brook valley, 6, 33, 41 
Standish mine, 45, 64; description, 97 
Steele mine, 42, 63, 75, 84; descrip- 
tion, 84 
Sterling group, 42, 63, 74, 75-90, 84; 
map, facing p. 75 
Sterling hill, N. J., 32 
Sterling Iron and Railway Co., 19 
Sterling Iron Mountain Railway 
Company, 83 
Sterling lake, 6, 33, 61 
Sterling lake group, 36 
Sterling mine, 33, 42, 62, 63; descrip- 
tion, 75 
Stewart, A. (©; quoted) 20)" 
Stewart mine, 46; description, III 
Stolz, G. C., quoted, tor; mentioned, 
20, 100 
Storm King granite, 28, 38, 54 
Storm King mountain, 34 
Stranded fault-blocks, 32, 35 
Structural features of the Highlands, 
32 
Structural features of the magnetite, 
55 
Structural foliation, 59 
Summit mine, 42, 63, 75; description, 
81; fig. p. 82 
Sunk mine, 20, 46; description, III 
Surebridge mine, 97 
Sussex county, N. J., 10, 23 
Swells, 55 
Sweeny, 
LOmG 
Symplectite, 95 
105; 
Le ee 
acknowledgments 
