PLATE XI. 



A. Looking ninth over the cvest of Hoosac mountain from the northern end of the granitoid 

 gneiss (compare PI. v., Profile IX), showing the outcropping edges of the northerly dipping (pitch- 

 ing) beds of conglomerate gneiss and albite schist. From a drawing by Josiah Pierce, jr. 



B. Profile of Hoosac mountain from Spruce hill southward, looking west. 



This includes the contact of all three formations — granitoid gneiss (Stamford gneiss), conglomerate 

 (Vermont gneiss), and albite schist (Hoosac schist). The. northerly pitch of the axis and consequent 

 overlay of the formations to the north shows plainly in the long gentle northward slope and sharp 

 bluffs to the south. The rounded granite topography of the coarse gneiss is also in marked contrast 

 with the serrations produced by conglomerate and schist. (Jf. Plate v, Profiles ix and x. 



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