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Signor-Lipps effect

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The Signor-Lipps effect is a paleontological effect describing the fossil record's reflection of an extinction event, such as the proposed impact event that caused the extinction of the dinosaurs. The effect states that since the fossil record of organisms is never complete, neither the first nor the last animal in a given taxon will be recorded as a fossil. Consequently, even a mass extinction may appear to be the result of gradual extinction in the rock.

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pt:Efeito Signor-Lipps
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