File:Mudcracked limestone (Tyrone Limestone, Middle Ordovician, 454 Ma; Frankfort, Kentucky) 1.jpg
![File:Mudcracked limestone (Tyrone Limestone, Middle Ordovician, 454 Ma; Frankfort, Kentucky) 1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Mudcracked_limestone_%28Tyrone_Limestone%2C_Middle_Ordovician%2C_454_Ma%3B_Frankfort%2C_Kentucky%29_1.jpg/754px-Mudcracked_limestone_%28Tyrone_Limestone%2C_Middle_Ordovician%2C_454_Ma%3B_Frankfort%2C_Kentucky%29_1.jpg?20200302224232)
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editDescriptionMudcracked limestone (Tyrone Limestone, Middle Ordovician, 454 Ma; Frankfort, Kentucky) 1.jpg |
English: Mudcracked lime mudstone from the Ordovician of Kentucky, USA. (~12.7 centimeters across at its widest)
Mudcracks are diagnostic sedimentary structures indicating subaerial exposure of sediment surfaces, with alternating wet & dry conditions. They are much more common that raindrop imprints, which indicate the same environmental setting. Mudcracks are most likely to occur in fine-grained siliciclastic rocks, fine-grained carbonate sediments, and in some evaporitic successions. Mudcracks are distinctive and easy to identify, but they do vary in appearance. The cracks themselves vary in width, depth, and areal density. Mudcrack polygons also vary in size & shape. Stratigraphy: upper Tyrone Limestone (just above the Deicke Bentonite), Black River Group, upper Middle Ordovician (sensu traditio), 454 Ma Locality: abandoned quarry near the intersection of Route 127 and Route 421, northern side of the town of Frankfort, south-central Franklin County, north-central Kentucky, USA |
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Source | https://www.flickr.com/photos/47445767@N05/49610637781/ |
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@N05/49610637781 (archive). It was reviewed on 2 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
2 March 2020
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current | 22:42, 2 March 2020 | ![]() | 5,974 × 4,748 (21.22 MB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
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Height | 4,861 px |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 1,200 dpi |
Vertical resolution | 1,200 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 14:48, 2 March 2020 |
Exif version | 2.21 |
Color space | sRGB |
Unique ID of original document | EFD1904CD521C3CEEA91B531A84057EE |
Date and time of digitizing | 09:26, 2 March 2020 |
Date metadata was last modified | 09:48, 2 March 2020 |
IIM version | 24,640 |