384 Scientific Intelligence. 
are now a thousand feet or more above the sea-level, must be 
assumed to have been either under marine waters, or else under 
the fresh-waters of an immense lake. The deposits, as all admit, 
are not marine; and too, they are not lacustrine. ose of the 
Connecticut valley correspond well, in all parts, to those of fluvial 
lake, this would not have been true, forithese rocks would have 
been submerged, and could not have contributed much, if any, 
to the sediments. 
3.) The beds bear evidence of swift currents and slow inter- 
mittedly, and often locally distributed, in the varying coarseness 
and fineness of the beds, answering precisely to the characters of 
the later valley deposits of the Connecticut ; and these are fluvial, 
not lacustrine, conditions. 
4 e coarse deposits are most common along or toward the 
borders of the area, yet are not excluded from other parts, and 
occur at intervals, not continuously, on these borders. The finer 
cylinders of limestone which are possibly of concretionary org!”, 
like the common “ clay-stones ” of clay beds. 
Th ness of : h unusual 
i.) The coarseness of much of the sandstone, the 
