azoic


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Related to azoic: Azoic Age

a·zo·ic

 (ā-zō′ĭk)
adj.
Of or relating to geologic periods that precede the appearance of life.

azoic

(əˈzəʊɪk; eɪ-)
adj
(Geological Science) without life; characteristic of the ages that have left no evidence of life in the form of organic remains
[C19: from Greek azōos lifeless; see azo-]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.azoic - before the appearance of life; "azoic rocks contain not organic remains"
geology - a science that deals with the history of the earth as recorded in rocks
early - at or near the beginning of a period of time or course of events or before the usual or expected time; "early morning"; "an early warning"; "early diagnosis"; "an early death"; "took early retirement"; "an early spring"; "early varieties of peas and tomatoes mature before most standard varieties"
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The presence of phosphatic nodules and bituminous matter in some of the lowest azoic rocks, probably indicates the former existence of life at these periods.
1967), is noteworthy: "There is a huge flow of very hot and sulphurous water which is azoic at first but soon becomes .
A similar level of pollution may for example result in an increase in benthic biomass due to the high biomass of the bivalve Macoma balthica at flat, shallow, and oxygen-rich sea areas characteristic of the present study area (Kotta & Kotta, 1995) but lead to the formation of azoic sediments or a small remaining biomass of chironomid larvae in bottom cavities of enclosed bays at the highly mosaic coastline of the Finnish Archipelago area (Leppakoski, 1975; Bonsdorff et al.