246 Lead Mines, Se. of Hampshire County, Mass. 
the very same rock, only that the stratum was vastly thicker 
at the former, than at the latter place. 
Old red Sandstone and Conglomerate—deep green. 
The old red sandstone and conglomerate I have coupled 
together. These recks, in this region, lie above ail others, 
and seem to have taken their present position long since the 
formation of the primitive rocks, but anterior to the produe- 
tion of hills and mountains, and were I to hazard a conjec- 
ture upon the subject, I would say that the earth was first for- 
med without any mountains or vallies, or nearly so, and cov- 
ered with water. The water by currents and its movements 
abraded away the rocks, even down to granite in many in- 
rhaps account for the vertical position of many 
of rocks, for the globular or rounded masses of 
notice. These suppositions will also account for the fact that 
conglomerate lies often up the sides of mountains, which is 
the case upon Mount Holyoke, south of Amherst. Here 
the lomerate is seen to cover the fvot of the mountain, 
and gradually disappears as we advance to the top. At the adit 
be, the mane, at Southampton, the first rock which we see on 
entering the passage is conglomerate re ing against other 
