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Research and study works. Age a rock is determined by stratigraphy, a branch in geology which studies the chronology of events and modifications, combined with advancement of organisms, that have determined the introduction of the Earth from the time they turned into an independent spatial body until nowadays.

Research and study works. Age a rock is determined by stratigraphy, a branch in geology which studies the chronology of events and modifications, combined with advancement of organisms, that have determined the introduction of the Earth from the time they turned into an independent spatial body until nowadays.