General Index. 



689 



Rocks, their nomenclature, . . . .112 



their supposed changes in the line of their direction, 332 

 Roof Slate in Worcester County, ... 34 

 in the Connecticut Valley, ■ .35 



in Berkshire County, . . .35 



Rotten Stone in West Springfield, . . . .48 



Rubellite, . . . . .505 



S. 



Saddle Mountain, . . . . .74 



Salisbury, Ct. Iron Ore in . .56 



Sand, white, siliceous, .... 185 



micaceous, . . . 185 



green, ..... 185 



Sandstone, gray micaceous, . . . .212 



variegated, .... 212 



brecciated, .... 212 



columnar, at Titan's Pier, . . 432 



Sandy Neck, its gain upon the sea. . . . 129 



Sappare, ... ... 345 



Sardonyx, ...... 435 



Satin Spar, ..... 231, 312 



Scapolite, ..... 309, 346 



Rock, its agricultural character, . . 10 



its mineralogical characters, . . . 315 



Schorl, ..... 345, 398, 504 



Scientific Geology defined, . . . .3 



Part III. ... Ill 



Sea, its action upon the coast, . . . 124 



Section at Turner'3 Falls, .... 423 



in granite and chalk in Saxony, . . . 426 



and sandstone at Heidelberg, . . 427 



Section in granite and clay slate in Scotland, . 427 



in diorite and transition schist in the Hartz, . 428 

 in basaltic breccia lias, &c. in the Suabian Alps. 428 

 in greenstone and sandstone, Mt. Tom, . . 429 



in Plastic Clay, . . . . 197 



in graywacke, . . . . 274 



Sections accompanying the Report, . . . 523 



Selenite, ... . . 191,436 



Septaria, , . .214 



Serpentine, its economical uses, ... .39 



its agricultural character, . . • 10 



its definition, .... 365 



its mineralogical characters, . • 365 



its topography and associations, . . 366 



its Flora, ... 368 

 its mineral contents, . . . 371 



its theory, . ... 372 



Shales, . ..... 213 



Shark's bones and teeth at Gay Head, . . 194 



Sienite, its agricultural character, . • 13 



its use in architecture, . . .13 



defined, . . . 451 



its mineralogical characters, . • 452 



porphyritic . . . . . 453 



conglomerated, . . . 454 



augitic, ... . . 454 



its topography, . . . 455 



its pseudo-stratification, . . ■ 456 



veins in, ..... 456 



its geological position, . . • 460 



