File:Aragonite needles in vug in dolostone (Vinton Member, Logan Formation, Lower Mississippian; Route 16 roadcut northeast of Frazeysburg, Ohio, USA) 5 (40589494702).jpg

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Vug with aragonite crystals in dolostone in the Mississippian of Ohio, USA.

This rock has a small vug containing numerous clear to whitish needles of aragonite (CaCO3 - calcium carbonate). Aragonite is a less common polymorph of calcite and is rarely found in Ohio. The host rock is a glauconitic fossiliferous dolostone having crinoid stem columnals. The green spots in parts of the surrounding matrix are glauconite (click on the photo to zoom in & look around).

Stratigraphy: dolostone horizon below inferred Rushville Shale, upper Vinton Member, upper Logan Formation, ~middle Osagean Stage, upper Lower Mississippian

Locality: Trinway West 6 Outcrop - lower slopes of the eastern part of 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' 46.98" North latitude, 82° 04' 56.49" West longitude)
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Source Aragonite needles in vug in dolostone (Vinton Member, Logan Formation, Lower Mississippian; Route 16 roadcut northeast of Frazeysburg, Ohio, USA) 5
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40589494702 (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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Date/TimeThumbnailDimensionsUserComment
current02:20, 10 October 2019Thumbnail for version as of 02:20, 10 October 20192,627 × 1,780 (3.94 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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