INDEX 
Acknowledgments, 6 
Akerly, Samuel, mentioned, 7 
Alice mine, 97 
Alling, H. L., mentioned, 59 
Ames, Edward W., quoted, 
mentioned, 70 
Annsville, 9 
Annsville phyllite, 14 
Antecedent structure, 38 
Augusta mine, 43, 64, 72, 75, 90; 
description, OI 
Azoic formation, II 
IOI ; 
Bayley, W. S., quoted, 24, 25, 28, 
29; mentioned, 59, 70 
Bering mine, 44, 63, 75, 84; de- 
scription, 88 
Berkey, Charles P., acknowledg- 
ments to, 6; quoted, 14, 18, 26; 
mentioned, 19, 27, 28, 31, 32, 33, 
34, 35, 37, 3°, 39, 45, 52, 53, 59, 
62 
Birkinbine, John, quoted, 119 
Bottom rock, 55 
Bowen, mentioned, 102 
Bradley mine, 97 
Breakneck ridge, 34 
Breidenbaugh, E. S., mentioned, 121 
Brennan mine, 42, 75, 84, 85; de- 
scription, 86 
Brewster belt, 6, 21, 41, 47, 65, 70; 
description, 117 
Britton, N. L., quoted, 15, 17; men- 
tioned, 23 
Brooks, A. H., 
tioned, 51 
Brooks, Major T. B., mentioned, 16 
Buddington, A. F., mentioned, 59 
Bull hill, 34 
Bull mine, 45, 64; description, 106 
Buttermilk falls, 7. 
Byram gneiss, 24, 25, 28, 29 
quoted, 23; men- 
Cambro-Ordovician rocks, 10, 15 
Canada hill granite, 28, 38, 40, 52, 
53 
Canada mine, 20; description, III 
Canada mines group, 45, I10, I1I-21; 
map, facing p. I10 
Canopus creek, 41 
Canopus creek group, 20 
Canopus Iron Corporation, 114 
Canopus mine, 46, 64, 74, 110; de- 
scription, I14 
Cap rock, 55 
Cat hill granite, 28 
Catskill aqueduct, geology of, 27 
Causeway mine, 90; description, 95 
Clarke, John M., mentioned, 27 
Clarke mine, 80 
Clove mine, 45, 49; description, 107 
Clover hill mine, 47, 65; description, 
120 
Cold Spring, 6, 41, 46 
Connecticut, index map, frontispiece 
Cook, George H., quoted, 11; men- 
tioned, 23, 33, 59 
Cook mine, 43, 64, 72, 74, 90, 96; 
description, 91 
Correlation tables, 39-54 
Cortlandt series, 17, 26; Dana’s con- 
clusions regarding, 13 
Crawford mine, 42, 64, 75, 84; de- 
scription, 85 
Credner, Herman, quoted, I1 
Crolteminew 474157.) COV LIGa a LO 
Cronomer hill, 34 
Crossway mine, 36, 43, 50, 64, 75, 
90; description, 95 
Croton Falls, 6, 41 
Croton mine, 47, 74 
Cunningham mine, 97 
Cushing, H. P., mentioned, 59 
Daly, R. A., mentioned, 37 
Dana, James D., quoted, 13, 14; 
mentioned, I2, 23 
Denny mine, 20, 46; 
113 
Dennytown, 4I 
Deuteric effects, 70, 71 
description, 
