azoic

Heretofore, as is well known, an immense series of rocks below the silurians have been termed azoic, as exhibiting no remains of animal life; but this term must now be dismissed.

Geologists have divided a few years of the worlds history into periods, reaching from the azoic rocks to the soil of our time.

The latter formation is found in other sections with precarboniferous limestone and also with crystalline limestone of the azoic age.

When they knocked off the mould, these same authorities found that Challoner was right: this bit of concrete wall was as solid as if it had been cut out of smooth azoic rock.

Scientists long ago clung to the "azoic hypothesis" about the deep -- the presumption that nothing could possibly be alive so far from the photosynthetic world.