CONTENTS 



PAGE 



Introduction 51 



Geographic outline 51 



Rocks 53 



Crystalline limestone 53 



Quartzite 54 



Grani te 54 



Gneiss 55 



Anorthosites 57 



Trap dikes 58 



Moraines 59 



Water- sorted sands and gravels , 59 



Geologic age 60 



Eelief map — based on tbe Lake Placid and Mt Marcy sheets of the U. S. 



geological survey opp. p. 62 



Mineralogy 63 



Geologic map of the area arouud Lake Placid see cover j). 2 



Index ,,.,.,, 65 



