Spongiolite

Spon´gi`o`lite

    (~ô`līt)
n.1.(Paleon.) One of the microscopic siliceous spicules which occur abundantly in the texture of sponges, and are sometimes found fossil, as in flints.
References in periodicals archive ?
The Hamersley and the Fitzgerald rivers have formed cliffs of splendidly colored spongiolite (a sedimentary rock of marine origin).