Wordnet 3.0
ADJECTIVE (1)
1. 
 resembling or containing chert; 
The Collaborative International Dictionary of English v.0.48:
Cherty \Chert"y\, a.
   Like chert; containing chert; flinty.
   [1913 Webster]
WordNet (r) 3.0 (2006):
cherty
    adj 1: resembling or containing chert