Abstract
Discoveries during the last decade in organic geochemistry and palaeochemistry are used to assess concepts and to evaluate current scientific views on the nature and significance of organic matter in meteorites and early Precambrian rocks and its role in the origin and development of living systems. A critical account is given of the various chemical and organic structures contained in various ancient Precambrian rocks and carbonaceous chondrites. Analysis and identification of such organic matter contained in these rocks and meteorites are giving clues about how life originated and also about the nature and evolution of the early atmosphere, hydrosphere and early biological systems.
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