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Raindrop imprints 5 | by James St. John
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Raindrop imprints 5

Raindrop imprints are scarce, but highly diagnostic, sedimentary structures. They absolutely demonstrate that a particular bedding plane was subaerially exposed - it had to be land. Raindrop imprints are expected to be small circular to subcircular pits or craters on fine-grained siliciclastic sediment surfaces. They may be associated with mudcracks and terrestrial fossils (such as fossil ferns).

 

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Taken on December 2, 2018