crinoidal limestone

crinoidal limestone

[krī′nȯid·əl ′līm‚stōn]
(petrology)
A rock composed predominantly of crystalline joints of crinoids, with foraminiferans, corals, and mollusks.
References in periodicals archive ?
On polished walls and floors, such as those of London's Festival Hall, you can find the confused patterns of Hopton Wood crinoidal limestone from Derbyshire.
The base of the rotunda and the banister are dark purple-red crinoidal limestone (Fig.