File:Vugs with aragonite & calcite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 1.jpg
![File:Vugs with aragonite & calcite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/54/Vugs_with_aragonite_%26_calcite_crystals_in_arenaceous%2C_ferruginous%2C_fossiliferous_limestone_%28Vinton_Member%2C_Logan_Formation%2C_Lower_Mississippian%3B_Mt._Calvary_Cemetery_Outcrop_-_Rt._13_roadcut%2C_Heath%2C_east-central_Ohio%2C_USA%29_1.jpg/800px-thumbnail.jpg?20240326164652)
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[edit]DescriptionVugs with aragonite & calcite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 1.jpg |
English: Vugs with aragonite & calcite crystals in arenaceous, ferruginous, fossiliferous limestone from the Mississippian of Ohio, USA (6.1 centimeters across at its widest).
This unusual sedimentary rock has small vugs containing clear to whitish aragonite crystals (CaCO3 - calcium carbonate), plus some whitish calcite (also CaCO3). Aragonite is a less common polymorph of calcite. Aragonite is rarely found in Ohio. The host rock is a fossiiferous limestone. Its brownish coloration is due to significant iron oxide impurity, so it's a ferruginous fossiliferous limestone. Samples subjected to acid dissolution leave behind quartz sand-rich residues, so it's an arenaceous, ferruginous, fossiliferous limestone. The light brown-colored structures are principally crinoid stem columnals. Crinoid skeletal pieces are composed of calcite, but in this sample, the crinoid fossils have been dolomitized. Stratigraphy: Vinton Member (horizon occurs at the boundary between massive, thick-bedded Vinton below & thin-bedded, flaggy Vinton above), upper Logan Formation, Osagean Stage, upper Lower Mississippian Locality: Mt. Calvary Cemetery Outcrop - roadcut along eastern side of Jacksontown Road (Rt. 13), immediately adjacent to (east of) Mt. Calvary Catholic Cemetery, ~0.15 miles south of intersection with Hopewell Drive, Heath, south-central Licking County, east-central Ohio, USA (40° 02’ 00.8” North, 82° 24” 10.5” West) |
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Source | https://www.flickr.com/photos/47445767@N05/15196390163/ |
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@N05/15196390163. It was reviewed on 26 March 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
26 March 2024
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current | 16:46, 26 March 2024 | ![]() | 2,415 × 1,496 (1.46 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/15196390163/ with UploadWizard |
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Orientation | Normal |
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Horizontal resolution | 1,000 dpi |
Vertical resolution | 1,000 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 19:55, 17 November 2014 |
Color space | Uncalibrated |
Image width | 2,415 px |
Image height | 1,496 px |
Date and time of digitizing | 14:48, 17 November 2014 |
Date metadata was last modified | 14:55, 17 November 2014 |