FOSSIL GEOLOGY OF UNITED STATES. 299 
covered by diluvium. The fact, however, that their 
remains are so frequently met with in the neigh- 
bourhood of salt licks, and are in such a state of 
preservation, would seem to indicate that they per- 
ished at a later period than the general deluge. 
There still, however, remains the objection, that 
some specimens have been discovered which were 
covered to a considerable depth by diluvium. The 
reader may balance the difficulties, and choose be- 
tween them. 
The State of New- York abounds with a species 
of limestone which has been called encrinital, from 
its containing numerous fossil encrinites, or, rather, 
made up of comminuted fragments of these fossil 
remains ; very beautiful specimens of it are obtain- 
ed near Hudson, and in the Helderbergh Mountains 
near Albany ; also at Onondaga quarries, Syracuse, 
&c. It is sometimes, called "bird's-eye marble," 
and is used for ornamental purposes, as it is full of 
distinct annular marks of crinoidal vertebrae. 
Encrinital Marble of Derbyshire, showing portions of stems 
of encrinites, lymg in relief on a block of limestone. 
