File:Raindrop imprints on argillite (Rhode Island Coal Measures, Pennsylvanian; Attleboro, Massachusetts, USA) 1.jpg
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editDescriptionRaindrop imprints on argillite (Rhode Island Coal Measures, Pennsylvanian; Attleboro, Massachusetts, USA) 1.jpg |
English: Raindrop imprints on argillite from the Pennsylvanian of Massachusetts, USA. (field of view 5.2 centimeters across)
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). Stratigraphy: Rhode Island Coal Measures, Pennsylvanian Locality: Attleboro, Massachusetts, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/14860817717/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14860817717. It was reviewed on 19 June 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
19 June 2022
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current | 08:27, 19 June 2022 | 1,372 × 959 (1.46 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/14860817717/ with UploadWizard |
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