Friday, Dec. 30 



9.30-12.30 A. M. Session of the Geological Society, 



Williston Hall. 

 Session of the Palaeontological Society, 



Geological Lecture Room. 

 Session of the Mineralogical Society, 



Biological Lecture Room. 

 Session of the Society of Economic Geologists, 

 % Appleton Cabinet. 



2.00-5.00 P. M. Session of the Geological Society, 



Williston Hall. 

 Session of the Palaeontological Society, 



Geological Lecture Room. 



Session of the Mineralogical Society, 



Biological Lecture Room. 



Session of the Society of Economic Geologists, 



Appleton Cabinet. 



GEOLOGY OF AMHERST 



The geology about Amherst is, in general, that of the Connecticut 

 Valley, but in the immediate vicinity of the town there is considerable 

 variation from the typical development of the valley as a whole. 

 Many of the most typical structures and evidences of dynamic 

 changes can be seen from College Hill, or better still from the balcony 

 just outside the geology lecture room. 



The Connecticut Valley is a lowland, extending from just north 

 of Greenfield, Mass., 95 miles to New Haven, Conn., and varying 

 in width from some five miles at either end to 15 — 18 in the middle. 

 It is an uncompleted Tertiary peneplain on the soft Triassic sand- 

 stone, between an eastern and a western upland of crystalline rocks 

 of sufficient hardness to have preserved considerable of the old 

 Cretaceous peneplain, which extended over most of New England. 



The western upland, referred to in Massachusetts and Connecticut 

 as the Berkshire Hills, lies on folded igneous and met amorphic 

 rocks of Lower Cambrian to Silurian age. These rocks show ev- 

 idences of two disturbances, first the folding which made mountains 

 at the end of the Lower Cambrian, known as the Green Mountain 

 uplift. This mountain system, extending along the western border 

 of the present Berkshire region was eroded to its roots, and then 

 covered by marine sediments of Ordovician and Silurian ages; 



