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File:Oolitic ironstone (Furnaceville Hematite, Clinton Group, Lower Silurian; Wayne County, New York State, USA) 2 (49130770026).jpg

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Oolitic ironstone (oolitic hematite) from the Silurian of New York State, USA.

This is a scarce sedimentary lithology - oolitic ironstone. The dominant grains are rounded oolites and peloids composed of rusty-red hematite (iron oxide, Fe2O3). Marine macrofossil fragments are also present.

This unusual rock comes from the Early Silurian-aged Clinton Group of New York State. It is derived from a hematite-rich horizon that was mined as a source of iron ore in the late 1800s. Ironstone is present in Clinton and Clinton-equivalents at multiple sites in eastern America, from New York to Alabama to Ohio.

Stratigraphy: Furnaceville Hematite (= Seneca Park Bed), Brewer Dock Member, Reynales Limestone, Llandoverian Series, Lower Silurian

Locality: unrecorded/undisclosed site in Wayne County (probably an old iron mine in the Furnaceville area, north of the town of Ontario), western New York State, USA
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Source Oolitic ironstone (Furnaceville Hematite, Clinton Group, Lower Silurian; Wayne County, New York State, USA) 2
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@N05/49130770026 (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.

6 December 2019

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current03:03, 6 December 2019Thumbnail for version as of 03:03, 6 December 20192,703 × 1,778 (4.25 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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