Diluvium. 



161 



Likewise in several places between Andover and Boston, on gran- 

 ite and sienite. 



The high hill of gneiss in the center of Rutland, exhibits the 

 same. 



On the top of Wachusett mountain, 3000 feet above the ocean, a 

 few rods northwest from the prospect house, these furrows may be 

 seen ; though less distinct than in many other places. The rock gen- 

 erally on that side of the mountain, appears distinctly water-worn. 



In Westford, one mile north of the meeting house, on the road to 

 Dunstable, is a fine example, on mica slate. 



In Marblehead, on sienite, 15 rods southeast of the residence of 

 the Hon. William Reed, near a meeting house, are quite distinct 

 furrows. 



They appear on gneiss, near the meeting house in Petersham, 

 though not very distinct. 



At the north end of Federal Street, in Greenfield, and also half a 

 mile northeast of the Episcopal church, on the road to Gill, these 

 grooves are very distinct, on red sandstone. 



In the southeast part of Deerfield, near the banks of Connecticut 

 river, about two miles north of Sunderland bridge, they occur on trap 

 rock. Also very distinct and numerous in the north part of Sunder- 

 land, from 200 to 400 feet above the river, on sandstone and green- 

 stone. Other cases in the Connecticut valley might be mentioned ; 

 but as they might reasonably be imputed to fluviatile action, if there 

 were no other similar cases on higher ground, I shall omit them. 

 Indeed, I am in this case inclined to believe them of fluviatile ori- 

 gin : except perhaps where, as in Gill, we find grooves on the tops of 

 the highest hills. 



Between Whitingham and Wilmington, Vt. are numerous cases 

 on gneiss and mica slate. 



A very fine example occurs on the lofty hills in the north part of 

 Rowe. This hill rivals even Hoosac mountain in elevation. Near 

 Rowe meeting house, is another example. Fifty rods south of the 

 meeting house in Heath — a point higher than the center of Rowe 

 — are several other, though no very striking examples. 



In Blanford is one of the most striking examples of diluvial grooves 

 in the State. The hill half a mile north of the congregational meet- 

 ing house, where it occurs, is very high ; overlooking all the sur- 

 rounding mountainous country. 



A similar example may be seen near the meeting house in Norfolk, 

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