THE LYMAN SCHISTS OF NEW HAMPSHIRE 



367 



weeks were consumed. The survey of the rest of the area amounted 

 to a reconnaissance of intricately metamorphosed schists, regarding 

 which final conclusions were deferred until more could be learned. 

 Having had opportunity to revisit some parts of the field where the 

 "Lyman schists" are exposed and having examined a suite of thin 

 sections of these schists, I submit the present paper as a second 

 chapter on the geology of the "Ammonoosuc District." 



Fig. i. — Index map of the localities mentioned in the text. The shaded rec- 

 tangular area is the strip of country described in the article on the Littleton 

 fossiliferous horizon. 1, Blueberry Mountain. 2, Bald Hill. 3, Young's Pond. 

 4, Partridge Lake. 5, Parker Hill. 6, the "Parker Hill locality." 7, Lyman village. 

 8, Black Mountain. 9, the "Black Mountain locality." 10, Mormon Hill, n, Lit- 

 tleton. 12, Lisbon. Only a few roads are drawn. 



I am happy to express my gratitude to Mr. W. L. Whitehead, 

 a candidate for the doctorate of science in geology at the Institute, 

 for making the accompanying microphotographs, and to Mr. 

 Sayles for the use of Figs. 2 and 15. 



SUMMARY 



1. The term "Lyman schists" was applied by Hitchcock to 

 a group of schists many of which are characteristically whitish on 

 their weathered surfaces. 



