Geology^ ^c. of the Connecticut, 21 



stone dikes they contain. In East-Haven, also, six miles 

 distant, occur the red and grey slates of the Coal Forma- 

 tion ; in Northford, the fetid carbonate of hme ; at South- 

 ington the bituminous limestone j at Westfield the bitumin- 

 ous shale with ichthyolites ; at Durham the coarse con- 

 glomerate of the coal formation, and at Berlin the green- 

 stone and slates of the coal formation with interesting locali- 

 ties of coal, galena, blende, barytes, agates and zeolites in 

 the greenstone — all within half a day's ride. In East-Haven 

 appears the sea beaten granite ; and, a little farther to the 

 north and east, the gneiss, hornblende slate and mica slate 

 formations. 



The mineralogy of the vicinity of Yale, is also rich and 

 diversified. Suffice it just to mention the chalcedony, car- 

 nelian, amethyst, agates, stilbite, zeolite, laumoniie, preh- 

 nite, analcime, fee. of the neighbouring greenstone : the na- 

 tive copper, copper and lead ores, so abundant in the same 

 formation : — the native silver, bismuth, magnetical and com- 

 mon pyrites, galena, blende, the three ores of tungsten, the 

 tellurium, fluor spar, epidote, titanium, &.c. of Huntington ; 

 the asbestus, bitter spar, sahlite, serpentine, &ic. ofMilford : 

 the cobalt ores at Chatham ; the corundum, andalusite,* 

 &EC. of Litchfield ; and the chrysoheryl, beryl, tourmalines, 

 garnets, magnetic iron, columbium, &c. ofHaddam. 



Geological Position of Amherst Collegiate Institution, 



This is situated on elevated ground, and commands an 

 extensive and delightful view af the surrounding country. 

 It stands on granite, here covered by diluvium y but the 

 granite appears a short distance both north and south. On 

 the west, stretches out an alluvial plain ; on the south, rises 

 the lofty Holyoke of greenstone ; on the east, of gradual as- 

 cent, a mountain of gneiss ; on the north, appears, a few 

 miles distant, mount Toby, composed of rocks of the coal 

 formation ; and also the rounded Sugar Loaf of old red 

 sandstone : — while beyond the alluvial tract, on the west, 

 rises a high range of mountains made up of granite and sie- 

 nitic granite, (containing the interesting lead mine of South- 



* Recently announced by Major Delaficld. Vide Araer. Journ. f3ci. Vol. 

 6. p. 176. 



