108 PALEOZOIC PALEONTOLOGY. 
SKUNNEMUNK CONGLOMERATE. 
This conglomerate forms the great mass of the Bearfort mountain 
in New Jersey, and also of Bellvale mountain, which is its northward 
continuation in New York. Skunnemunk mountain, lying still fur- 
ther north in New York State, is another great mass of this con- 
glomerate, and has given rise to the name of the formation. The 
typical beds of the formation are a coarse, purple-red, massive con- 
glomerate, the pebbles of which are sometimes six or seven inches 
in diameter. Beds of red sandstone alternate more or less frequently 
with the conglomerate, and there are many gradations between the 
two. No fossils have been detected in the formation, and, as it is 
the youngest paleozoic formation in New Jersey, its age can only be 
determined by the underlying beds, which are Hamilton in age. It 
may be correlated with the upper Devonian of the New York section, 
but whether it is the exact equivalent of the Chemung-Catskill can- 
not be determined. 
