File:Ironstone nodule conglomerate (Massillon Sandstone, Lower Pennsylvanian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 1 (34329561091).jpg

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This large talus slab consists of unusual rock. It is quartzose sandstone with abundant, pebble-sized, ironstone nodules (= yellowish-brown & brownish-colored clasts). Some may be iron oxide-replaced brachiopods (such things were reported in early 1900s literature). The slab is derived from the basal lag of a sandstone body that occurs immediately above the Mississippian-Pennsylvanian unconformity (= megasequence boundary/Sloss sequence boundary). Laterally at this outcrop, the sandstone is slightly above the unconformity, with a coal horizon below the sandstone.

The sandstone is here interpreted to be the Massillon Sandstone, a variably-developed member in the lower to middle Pottsville Group.

Stratigraphy: inferred Massillon Sandstone, lower Pottsville Group, 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)
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Source Ironstone nodule conglomerate (Massillon Sandstone, Lower Pennsylvanian; Rt. 16 roadcut northeast of Frazeysburg, Ohio, USA) 1
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@N05/34329561091. It was reviewed on 24 June 2017 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

24 June 2017

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Date/TimeThumbnailDimensionsUserComment
current17:40, 24 June 2017Thumbnail for version as of 17:40, 24 June 20173,000 × 2,923 (7.67 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via Flickr2Commons

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