'Indusial limestone' definitions:

Definition of 'Indusial limestone'

From: GCIDE

Indusial \In*du"sial\, a. [See Indusium.] Of, pertaining to, or containing, the petrified cases of the larv[ae] of certain insects. [1913 Webster]
Indusial limestone (Geol.), a fresh-water limestone, largely composed of the agglomerated cases of caddice worms, or larv[ae] of caddice flies (Phryganea). It is found in Miocene strata of Auvergne, France, and some other localities. Indusiate