spongolite


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spongolite

[′späŋ·gə‚līt]
(geology)
A rock or sediment composed chiefly of the remains of sponges. Also known as spongolith.
References in periodicals archive ?
As Murray and Williamson point out, the apparent abandonment of volcanic glass as a tool material could be counterbalanced by the take-up of spongolite stone 2,500 years ago--but the absurdity of arguing out this change as 'advance or 'regress' should be clear.