THE 



JOURNAL OF SCIENCE, &c. 



MINERALOGY AND GEOLOGY. 



Arx. I. Remarks on the Geology and Mineralogy of a 

 Section of Massachusetts on Connecticut River^ with a 

 Part of JVeiv- Hampshire and Vermont; by Edward 

 Hitchcock, \.M. Principal of Deerfield .dcademy. 



3. HE geology of this tract, from a £ew miles south of North- 

 ampton in Massachusetts, to the north boundary of Brattle- 

 borough in Vermont, and of Chesterfield in New- Hampshire, 

 is shown on the subjoined map. The primitive formation, 

 except the argillite, is coloured vermilion ; the secondary, 

 blue ; and the alluvial, gamboge yellow, according to Cleave- 

 land. The alluvial part is elevated above the bed of Connec- 

 ticut river from 10 to 100 feet, and, in most places, reposes 

 on red sandstone. The soil in the northern part is generally 

 argillaceous ; but in the southern more siliceous. The se- 

 condary formation consists chiefly of detached eminences that 

 rise abruptly from the plain, and are composed of red sand- 

 stone and puddingstone alternating, except the elevations A 

 and B, (Holyoke and Tom) and a part of the range CD, pass- 

 ing through Deerfield and Greenfield, which are greenstone. 

 The part coloured rose-red consists of argillite, sometimes 

 Vol. I No. 2. 11 



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