File:Siderite ironstone nodule (Lower Mississippian or Lower Pennsylvanian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) (33430160675).jpg
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Summary
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| Description |
This rock has eroded from an outcrop of mixed siliciclastic sedimentary rocks. The locality has Pennsylvanian rocks disconformably overlying Mississippian rocks. I'm not sure of the provenance of this specimen (i.e., whether it's derived from above or below the unconformity). The sample is a nodule composed of ironstone. The interior of the nodule, as shown on this crack surface, is grayish siderite (FeCO3 - iron carbonate). The slightly reddish-colored margin is a weathering rind. The reddish-brown area in the interior is hematite. Stratigraphy: Vinton Member, upper Logan Formation, Osagean Series, upper Lower Mississippian OR lower Pottsville Group, Morrowan Stage, upper Lower Pennsylvanian Locality: Trinway West 6 Outcrop - roadcut on the northwestern side of Rt. 16, 1.0 miles northeast of the Rt. 16-Old Riley Road intersection, northeast of the town of Frazeysburg & west of the town of Trinway, northwestern Muskingum County, Ohio, USA (40° 08' 41.54" North latitude, 82° 05' 06.18" West longitude) |
| Date | |
| Source | Siderite ironstone nodule (Lower Mississippian or Lower Pennsylvanian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) |
| 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@N05/33430160675 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:03, 6 December 2019 | | 3,406 × 1,193 (2.76 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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