File:Vug with aragonite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 3 (15630984930).jpg

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Vug_with_aragonite_crystals_in_arenaceous,_ferruginous,_fossiliferous_limestone_(Vinton_Member,_Logan_Formation,_Lower_Mississippian;_Mt._Calvary_Cemetery_Outcrop_-_Rt._13_roadcut,_Heath,_east-central_Ohio,_USA)_3_(15630984930).jpg ‎(800 × 600 pixels, file size: 491 KB, MIME type: image/jpeg)

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Vug with aragonite crystals in arenaceous, ferruginous, fossiliferous limestone from the Mississippian of Ohio, USA (photograph taken & provided by James Cheshire).

This unusual sedimentary rock has small vugs containing clear to whitish aragonite crystals (CaCO3 - calcium carbonate). Aragonite is a less common polymorph of calcite. Aragonite is rarely found in Ohio. The host rock is an arenaceous, ferruginous, fossiiferous limestone with dolomitized crinoid stem columnals. The dark brown material in the upper right portions of the vug is goethite (FeO·OH - iron hydroxy-oxide).

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 Vug with aragonite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 3
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@N05/15630984930 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 October 2019

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current02:12, 10 October 2019Thumbnail for version as of 02:12, 10 October 2019800 × 600 (491 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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