ORIGIN OF TIM. LYMAN SCHISTS OF NEW HAMPSHIRE 



FREDERIC II. LAHEE 

 Massachusetts Institute of Technology 



TABLE OF CONTENTS 



PAGE 



[introduction ' 366 



Sl'MMAKY 367 



The Lisbon and Lyman Series 368 



I'.KXKKAI DlSl'RllUmON OF THK LYMAN SERIES 369 



luiD Relations and Megascopic Descriptions of the Lyman 



SlKIES 



The Young's Pond Locality 369 



rhe Mormon Hill Locality 371 



rhe Parker Hill Locality 372 



Microscopic Descriptions 



Porphyry Schist of the Young's Pond Locality 372 



Pebbles of the Conglomerate Schist of the Young's Fond Locality . 374 



Parker Hill White Schist 373 



Parker Hill Dark Schist 376 



Generai Conclusions on the Origin of the Lyman Schists 



Porphyry Schist of the Young's Pond Locality 377 



Parker Hill White Schist 37S 



Conglomerate Schist of the Young's Pond Locality 379 



Structurai Relations of the Lyman Series 380 



\cinn- Likusiye Rocks East of the Appai aciuax Protaxis . . . 380 



INTKODV CTION 



During the summers of 191 1 and 1912, through the generosity 

 of Mr. R. YY. Sayles, I made a geological investigation of part of 

 the townships of Littleton, Lisbon, Lyman, Bethlehem, Bath, and 

 Landaff, in New Hampshire. In the fifteen weeks devoted to this 

 work about 250 square miles were examined. The results that have 

 been published 1 have reference to an area of only eight or nine 

 square miles (Fig. [), in the study oi which three of the fifteen 



1 V. II. Lahee, "Geology of the New Fossiliferous Horizon and the Underlying 



Reeks, in Littleton. New Hampshire," A»i. Jour. Set. (4), XXXY1 | ioi,0. 831-50. 



