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Sauropod footprints in thinly-layered sediments responsible for ‘onion-ring’ effect in broken or weathered specimens.

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posted on 20.02.2013, 04:45 by Tony Thulborn

A, example broken obliquely, showing extent of laminations enclosing the entire footprint. B, example broken horizontally, revealing typical ‘onion-ring’ pattern of laminations surrounding the footprint.