Mudcracks (possibly Silurian of Ohio, USA) : 無料・フリー素材/写真
Mudcracks (possibly Silurian of Ohio, USA) / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | (bedding plane view - underside)---------------------------------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: unknown (but possibly from the Tymochtee Dolomite, Upper Silurian)Provenance: unknown (but possibly from an Ohio quarry)Locality: garden stone at Cedar Hill Cemetery, Newark, Licking County, east-central Ohio, USA |
| 撮影日 | 2024-05-25 15:31:18 |
| 撮影者 | James St. John |
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