INDEX TO MUSEUM BULLETIN 21 



67 



Sand plaiDS, 528, 635. 



Sands, 59^ ; incoherent, 53* ; water- 

 sorted, 599-603. 



Sandstone, see Potsdam sandstone. 



Saranac, topography, 525. 



Scapolite, 54^. 



ScottB Cobble, granite, 55i. 



Sentinel mountain, 521; altitude, 53^; 

 anorthosites, 58*; glacial amphithea- 

 ters, 632; gaeisses, 56'^; quaternary 

 period, 62^; trap dike, 58^. 



Sunrise Notch, gneisses, 56"^. 



Terraces, fanshaped, 59^. 



Tertiary period, possible history, 62i. 



Titanite, 642. 



Trap dikes, 53*, 55^; age, 61^; distri- 

 bution and characteristics, 58^-591 ; 

 geologic age of, 60*. 



Utica slate, 619. 



Vesuvianite, 641. 



Walcott, C : D., acknowledgments to, 

 512. 



Water-sorted sands and gravels, 59^- 

 603. 



West Branch, see Ausable river, west 

 branch. 



Weston mine, Keene, 642. 



WLiteface lun, anorthosites, 58*. 



VVhiteface, Mt, 518; altitude, 531; 

 anorthosites, 578; glacial amphi- 

 theaters, 631; granite, 54^; quater- 

 nary period, 628. 



Wilmington, anorthosites, 57^. 



Wilmington Notch, 521; granite, 54^; 

 trap dike, 58^. 



Wilmington valley, anorthosites, 58*. 



Wilmington village, altitude, 529. 



Zircon, 558, 541. 



