132 GREEN MOUNTAINS IN MASSACHUSETTS. 



the relation of the limestone t<> the schist wen- pointed out l>v Profs. Hall 

 and Emmons, and confirmed by Profs. Hitchcock and Dana, and the com- 

 plex character of that svncline was recently conjectured by Prof. Dana. 

 Moreover, scattered through the writings referred to, are a number of 

 important observations on portions of the mountain, to which reference will 

 be made in proper place. 



Of these writings, those of Profs. Emmons and Dana include the 

 Taconic question, into the consideration of which the structural and area] 

 geology of the Grreylock mass partly enters. Notwithstanding' the time 

 that has elapsed since a geologic hammer was first applied to Mount Grey- 

 lock, and notwithstanding the number and ability of the geologists who 

 have lived and worked in its vicinity, little lias been accomplished beyond 



Berkshire, Massachusetts, by gentlemen in the county, clergymen, and laymen." Pittsfield, 1829 (p. 

 190, " Geology," and "a geological map of the county of Berkshire, Massachusetts, and of a small pari 

 of the adjoining states. 1824 " I. 



Ed ward Hitchcock : Report on the geology, mineralogy, botany, and zoology of Massachusetts. 

 First and second editions, Amherst, is::.".. 



Edward Hitchcock : Final report on the geology of Massachusetts. Amherst and Northampton, 

 1841. 



Ebeuezer Emmons: Taconic system, forming chap. VII of the Geology of New York, part n.Nat. 

 Hist, of N. Y., part IV, Albany, 1842. 



Ebenezer Emmons : The Taconic system, based cm observations in New York, Massachusetts, 

 Maine, Vermont, and Rhode Island, Albany, 1844. 



Ebenezer Emmons: The Taconic system, forming chap. v. of vol. 1, of the Agriculture of New 

 York. Nat. Hist, of N. Y.,part v, Albany. 1846. 



Ebenezer Emmons : American Geology, vol. 1, part n. Albany, 1855. 



Edward Hitchcock: Report on the Geology of Vermont: descriptive, theoretical, economical, and 

 scenographical. Proctorsville, Vermont, 1861, vol. 1, p. 255, vol. 2, p. 595, pi. xv, tig. 5. 



James D. Dana: On the qnartzite, limestone, and associated rocks of the vicinity of Great Har- 

 rington, Berkshire county, Massachusetts. Am. Jour. Sci., ser.ni, vol. 6, 1873, p. 273. 



James D. Dana: An account of the discoveries in Vermont Geologj of the Rev. Augustus Wing. 

 Am. Jour. Sci., scr. in, vol. 13, 1877, p. 347. 



James D.Dana: On the relation of the Geology of Vermont to that of Berkshire. Am. Jour. Sci. 

 ser. in, vol. 14,1877, pp. 41.261-263. 



James D. Dana: Note on the Age of the Green mountains. Am. Jour. Sci., ser. in, vol. 19, 1880, 

 p. 191. 



James D. Dana : On 'laconic rocks and stratigraphy, with a geological map of the Taconic region. 

 Part n. Am. Jour. Sci., ser. ill, vol. 33, May, 1887, p. t05, HO. 



James Hall: Section from Petersburg, New York, across Greylock to Adams, the basis of remarks of 

 his at a meeting of the American Association of Geologists and Naturalists, between 1839-1844, both 

 unpublished. See Am. .lour. Sci., ser. ill, vol. 28, 1884, p. 311, " Prof, .lames Hall on the Hudson river, 

 age of t Ik- Taconic slates." 



