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Adj.1.silicious - relating to or containing or resembling silica; "gritrock is siliceous sandstone"
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These creatures, to judge from the shrivelled remains that have fallen into human hands, were bipeds with flimsy, silicious skeletons (almost like those of the silicious sponges) and feeble musculature, standing about six feet high and having round, erect heads, and large eyes in flinty sockets.
Soon the nature of the soil changed; to the sandy plain succeeded an extent of slimy mud which the Americans call "ooze," composed of equal parts of silicious and calcareous shells.
In the silicious matter which the water deposits is perhaps the bony system, and in the still finer soil and organic matter the fleshy fibre or cellular tissue.
[13] EPA, Method 3052 Microwave Assisted Acid Digestion of Silicious and Organically Based Matrices, EPA SW-846, Revision 3, Environmental Protection Agency, Washington, DC, USA, 2004.
Anyway, some ancient bacteria-like forms have proven controversial [33-35], and some ancient fossil microbial forms are regarded as the result of the evaporation and precipitation of rocks or the transformation of soft sediment and the silicious solution [36, 37].