176 



NEW YORK STATE MUSEUM 



Schaghticoke shale, 66, 73-74, 107, 



III, 141, 142, 165 

 Schenectady formation, 51-53 

 Schists, 17, 18, 21, 22, 23, 25 

 Sehizocrania filosa, 50, 96 

 Schizocrinus cf. nodosus, 97, 98 

 Schodack Landing, 82, no, 115 

 Schodack shales and limestones, 66, 



69, 72, 73 

 Schuchtrt. Charles, cited, 38, 42 

 Schuylerville, 74, 107 

 Schuylerville quadrangle, 6-7, 11 

 Seely, H. M., cited, 42 

 Shale belt, structural geology, by 



R. Ruedemann, 99-115 

 Shales, 7, 10-12 



Siphonotreta cf. minnesotensis, 80 

 Smyth, Charles H., jr, acknowledg- 

 ments to, 6 

 Snake hill, 104 

 Snake Hill beds, 49, 51, 66, 89, 93-99, 



100, 102, 105, 108, 109, III, 142, 165 

 Snook kill, loi 

 Solenomya ? insperata, 97 

 Solenopleura nana, 67 



tumida, 67, 72 



compacta, 47 

 South Corinth, 56 

 Sprakers, 10 

 Springs fault, 60 

 Spyroceras bilineatum, 98 

 Star spring, 62 

 Staurograptus dichotomus var. 



apertus, 7Z 

 Stenotheca rugosa, 72 

 Stictoporella cribrosa, 47 

 Stoller, J. H., cited, 146 

 Stone quarries, 149 

 Stose, G. W., cited, 83 

 Strophomena trentonensis, 47 

 Structural geology of the shale belt, 



by R. Ruedemann, 99-115 

 Structural geology of the western 



basin, by H. P. Cushing, 53-65 

 Sturdevant creek, 12 

 Sulphur waters, 152 

 Syenite, 16, 17, 21, 26-28, 29 



Technophorus cancellatus, 97 



Terraces, 14-15 



Theresa formation, 31, 32, 35-38, 58, 



59, 60, 137 

 Ticonderoga, 35 

 Titanite, 20, 21, 23 

 Topography, 8-15 

 Tornebohm, A. E., cited, 84 

 Tourmaline, 23 

 Trap, 17, 21, 149-50 

 Trap dikes, 29 

 Trenton limestone, 31, 66, 76, 139,- 



165 

 Trenton limestone, basal, see Glens 



Falls limestone 

 Trenton shale, 31 

 Triarthrus becki, 50 

 Tribes Hill, 10 

 Tribes Hill limestone, 43 

 Triblidium cornutaforme, 42 

 Trilobites, 77 



Trinucleus concentricus, 97, 98 

 Trocholites ammonius, 50 

 Troy shales, 70 



Ulrich, E. O., acknowledgments to, 

 6; mentioned, 32; cited, 38, 42, 47, 

 74, 78, 83, 93, 113, 114, 115, 141, 143 



Utica beds, 53 



i 



Van Rise, P. A., cited, 30 

 \^an Ingen, Gilbert, acknowledg- 

 ments to, 6; cited, 112 

 Vanuxem, L., cited, 53 

 Vermont, Lake, 147 

 Victory Mills, 104 t 



Walcott, C. D., cited, 7, 38, 72, 76, 



79, 90, 108; investigations by, 66 

 Watertown formation, 138, 139 

 West Galway fault, 56, 57-59 

 Western basin, structural geology 



of, by H. P. Cushing, 53-65 

 Whiteavesia cincta, 96 



cumingsi, 96 

 Whitehall, Z3 



