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 60. 



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



Albite, 552. 



Algonkian formations, 60^. 



Altitudes, 529-532. 



Amphiibeaters, glacial, 62^. 



Anortbosites, 53*, 615, 037; age, 612; 



characteristics and distribution, 



571-585; relations to gneiss, 56^. 

 Apatite, 55^. 

 Archeau, term, 60*. 

 ' Auoen ' in labradorites, 55^. 

 Augite, 572, 588. 

 Ausable cbasm, 52'^. 

 Ausable river, east branch, crystalliue 



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



551 ; trap dike, 59i. 

 Ausable river, west branch, 526; (jg. 



scent, 529 • gneisses, 56"^. 

 Avalanch pass, 523, 52?. 



Basalt, 587. 



Boulders, 592; near Lake Placid, 59'; 



of Potsdam sandstone, 628. 

 Brown, John, boulder at his grave, 59'. 



Calcite, 538, 639, 643. 



Cascade mountain, 523; altitude, 531; 



minerals, 64i. 

 Cascade Notch, 523 j trap dike, 589. 

 Cascadeville, limestone, 61*, 639. 

 Clifford brook, glacial amphitheaters, 



632. 

 Clifford falls, trap dike, 589. 

 Cliffs, gneiss, 56'; quartzite, 54'. 

 Cobble Hill, altitude, 533. 

 Coccolite, 538, 639. 



Crystalline limestone, 53*; distribu- 

 tion and characteristics, 535-543, 

 See also Limestones. 



Cusbing, H. P., conclusions, 569, 618. 



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



Deltas, 535, 599, 635. 



Dikes, distribution and characteristics, 



585-591. 

 Diorites, 57^. 

 Drainage systems, old, 62*; present, 



625. 



Eagle Eyrie, altitude, 532 • 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, 531 ; plagio- 



clase, 575-588. 

 Foliation, 555 ; cause, 56*, 617. 

 Franklin falls, granite, 549. 

 French's, boulder, 595. 



Gabbros, 576. 



Garnets, 542, 557^ 533. 639, 642. 



Geographic outline, 51^, 532. 



Geologic age of rocks, 60*-637. 



Giant mountain, glacial amphitheaters, 



63*. 

 Glacial amphitheaters, 63i. 

 Glacial period, evidences of, 592, 628. 

 Glass, _588. 



