Geology, §c. of the Connecticui. 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 lime ; at South- 
ington the bituminous limestone ; ; 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, harytes, 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- 
post amethyst, agates, stilbite, zeolite, canoe “ame 
analcime, &c. of the neighbouring gree : the na 
tive copper, et dod and lead ores, so sosadiadant i in 1 the same 
formation :—t 
mon pyrites, walemr blende, the thee ores of 1 tungsten, 
tellurium, fluor spar, epidote, titanium, &c. of Huntington : 
the asbestuh, bitter spar, sahlite, serpentine, &c. of Milford : 
= cobalt ores at Chatham; the corundum, andalusite,* 
&c. of Litchfield ; ; and the chrysoberyl, beryl, eae 
garnets, magnetic iron, columbium, &c. of Haddam 
Uti’ 
’ Geological Position of Amherst Collegiate Institution. 
This is situated on elevated ground, and commands an 
extensive and delightful view af the surrounding cou — 
It stands on granite, here covered by diluvium; 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 5 and also the rounded Su gar Loaf of old red 
sandstone :—while beyond the alluvial tract, on the west, 
ee a high range of mountains made up of granite and sie- 
ie granite, (containing the interesting lead mine of South- 
* Recently announced by Major Delafield. Vide Amer. Journ. Sci. Vol. 
6. p. 176. 
