454 J. D. Dana— Geological Relations of the 
ersey. Much of the limestone is bluish “ magnesian lime- 
tone,” uncrystalline or slightly crystalline, described by Profes- 
sor Cook as Calciferous, and not yet found to be fossiliferous; 
but, besides this, there are Trenton beds, in which fossils have 
been detected at various points. 
urther, the two belts of limestone and slates of Dutchess 
County are separately continued along and through the New 
Jersey Highlands. The Wappinger Valley (or Barnegat) belt, 
passing within a mile of Newburgh on its southwestward 
course, is continued, though with interruptions, in the large 
limestone area lying partly along the western side of the 
Archean and partly within its great western longitudinal val- 
ley, and reaches the Delaware River near Belvidere; and it is 
described by Professor Cook as having Trenton fossils near 
Middleville, Branchville, Newton, Huntsville, Stillwater, Belvi- 
associated quartzyte (the latter outcropping at several points 
between the limestone and the Putnam County Archean), is 
the great valley that includes Greenwood Lake and German 
Valley and ends in the limestone on the southern border of 
the Archean about Clinton. Only a little limestone is indi- 
eated along the belt on the map; yet it outcrops at several 
points (marked L) besides in other larger areas, notwithstand- 
ing the losses from ages of denudation; and, at pper Long- 
and thence the rocks of these belts, but slightly crystalline 
near Peekskill, extend southwestward along the eastern 
border of the New Jersey Highlands, outcropping as mag- 
led 
. Rep. N. Jersey, p. 131: and on the “ Magnesian limestone which is the 
Calciferous sandstone of the New York Geologists,” pp. 90-130 
Archean valley are accompanied, west of Greenwood Lake, by shale and con- 
glomerate, which are referred by Professor Cook to the Upper Silurian. 
