INDEX 



The superior figure points to the exact place on the page in ninths ; e. g. 60* means four 

 ninths of the way down page bO. 



Age of rocks, geologic, 60*-63'^. 



Albite, 552. 



Algonkian formations, 60^. 



Altitudes, 529-532. 



Am phi lb eaters, glacial, 62^. 



Anortbosites, 53*, 615, 63"^; age, 612; 

 cbaracteristics and distribution, 

 571-585; relations to gneiss, 56^. 



Apatite, 55^. 



Arcbeau, term, BO*. 



* AugeD ' in labradorites, 55^. 



Augite, 572, 588. 



Ausable cbasm, 52'^, 



Ausable river, east branch, crystalline 

 limestone, 53''^; gneisses, 56"^; granite, 

 551 ; trap dike, 591. 



Ausable river, west branch, 52^; de- 

 scent, 529 J gneisses, 56"^. 



Avalanch pass, 52^, 52'^. 



Basalt, 58^. 



Boulders, 592; near Lake Placid, 59''^; 



of Potsdam sandstone, 62^. 

 Brown, John, boulder at his grave, 59"^. 



Calcite, 538, 539^ 543. 



Cascade mountain, 523; altitude, 53^; 



minerals, 64i. 

 Caacade Notch, 523 • trap dike, 58^. 

 Cascadeville, limestone, Gl*, 63^. 

 Clifford brook, glacial amphitheaters, 



632. 

 Clifford falls, trap dike, 58^. 

 Cliffs, gneiss, 56"^; quartzite, 54*^. 

 Cobble Hill, altitude, 533. 

 Coccolite, 538, 639. 



Crystalline limestone, 53*; distribu- 

 tion and characteristics, 53^-543. 

 See also Limestones. 



Cusbing, H. P., conclusions, 56^, 618. 



Dana, J. D., use of word arcbeau, 60*, 



Deltas, 535, 599, 635. 



Dikes, distribution and characteristics, 



585-591. 

 Diorites, 57^. 

 Drainage systems, old, 62*; present, 



625. 



Eagle Eyrie, altitude, 532 j gneisses, 



56'^; trap dike, 588. 

 East Branch, see Ausable river, east 



branch. 

 Elizabethtown valley, lake bottoms, 



603. 

 Emmons, Prof., opinion, 573. 



Fault, 547, 587, 625. 



Feldspar, 539, 551, 557^ 558^ 58I; plagio- 



clase, 575-588. 

 Foliation, 555 • cause, 56*, 61^. 

 Franklin falls, granite, 549. 

 French's, boulder, 595. 



Gabbros, 576. 



Garnets, 542, 557^ 533, 639, ^42. 



Geographic outline, 51^, 532. 



Geologic age of rocks, 60*-637. 



Giant mountain, glacial amphitheaters, 



63*. 

 Glacial nmphitlieaters, 631. 

 Glacial period, evidences of, 592, 628. 

 Glass, 588. 



