MINEEAL VEINS. 505 



WiUiamshurg. — Northeast part; vein not seen; lar^e blocks of (juartz 

 occur in great profusion in a range several rods wide and one-(juarter of a 

 mile long; the quartz is radiated and rich in galena and chalcopyrite. 

 (Nash.) 



Williamsburg. — Vein runs northwest, then north, and then northeasterly 

 into Whately; quartz partly green and amethystine with j)yrolusite and 

 galena, which increases northerly. (Nash.) 



WilUaiiisbun/. — Extending into AVhately one-half mile east of the above. 

 Contains galena and pyrolusite in quartz. (Nash.) 



Williamsburg. — At northwest corner of Northamjjton, near the argentite 

 locality (see Miueralogical Lexicon,^ under "Calcite"). It contains pseudo- 

 morphs of calcite and fluorspar; the vein extends down the brook one-third 

 of a mile on the east side. (Nash.) 



Shelburne. — North of J. Dole's, 1 mile west of Shelburne Center, at 

 southeast border of gneiss on contact of horidilende-schist and mica-schist; 

 vein 2 feet wide, containing pyrite, galena, blende, malachite; runs N. 25° 

 E., dip 40° E. 



Greenfield. — At junction of diabase and upper sandstone, on the west 

 bank of the Connecticut, 100 rods below the mouth of Fall River. It goes 

 north obliquelv into the diabase and south across the sandstone in the ri^'or 

 bed. The principal vein is 5 to 6 feet wide. It stnkes north-south; dips 

 90° ; malachite is common, the sulphuret is rare. There is a second vein 

 about a mile below^, and narrow veins with fine slickensides occur in other 

 places between. (E. Hitchcock.-) 



Turners Falls. — West side of the island at the falls; strike north-south; 

 dip 90°; prodiiced fine large masses of chalcopyrite and much siderite; is 

 in brecciated sandstone. 



Hatfield. — Vein appears in the Iduff of tonalite about 2 miles west of the 

 town, 60 rods north of the road to Williamsburg. It caii be traced N. G0° 

 W. for about 30 rods. A slanting shaft has been sunk from the base of 

 the bluff; the vein is 1 foot at surface and 3 feet at bottom. Farther west 

 the vein has been opened about 20 feet deep ; it is here 4 feet wide at 

 surface and S feet at bottom, l^ack from the vein the tonalite seems very 

 fresh, but under the microscope its feldspar is always much kaolinized. 



' Bull. U. S. Geol. Survey No. 126, 1895. 

 - Am. Jour. Scl., 1st series, Vol. VI, p. 207. 



