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Fossils are the hard remnant material of living organisms and hard evidence can be found from the fossils of early phanerozoic. During the early stages of formation of the earth it is supposed to consist of Igneous rocks only. Refer to the major processes of fossilization and it is found that fossils are usually related to areas nearby streams and basins (organisms require water for survival) and hence the only form of rocks can be sedimentary. In the case of metamorphic rock the remnants cannot sustain temp. and pressure changes and deform leaving no traces.

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12y ago

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