marly

from WordNet (r) 3.0 (2006)

marly
    adj 1: of or relating to or resembling or abounding in marl

from The Collaborative International Dictionary of English v.0.48

Marly \Marl"y\, a. [Compar. {Marlier}; superl. {Marliest}.]
   Consisting or partaking of marl; resembling marl; abounding
   with marl.
   [1913 Webster]