File:Celestite encrusting Megalomoidea canadensis fossil bivalve (Lockport Dolomite, Middle Silurian; quarry at Clay Center, Ottawa County, northwestern Ohio, USA) 1 (15402612309).jpg

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Celestite encrusting a Megalomoidea canadensis fossil bivalve from the Silurian of Ohio, USA (whitish crystalline mass is 3.2 cm along its longest axis).

These whitish, bladed crystals are celestite (a.k.a. celestine) - SrSO4, strontium sulfate. They are encrusting the internal mold of a fossil bivalve, preserved in dolostone. The grayish-brown, glittering crystals are dolomite - CaMg(CO3)2 - calcium magnesium carbonate.

Stratigraphy: Lockport Dolomite, upper Niagaran Series, (upper Wenlockian), upper Middle Silurian

Locality: quarry at or near the town of Clay Center, southern Allen Township, northwestern Ottawa County, northwestern Ohio, USA
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Source Celestite encrusting Megalomoidea canadensis fossil bivalve (Lockport Dolomite, Middle Silurian; quarry at Clay Center, Ottawa County, northwestern Ohio, USA) 1
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15402612309. It was reviewed on 6 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

6 May 2015

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current19:03, 6 May 2015Thumbnail for version as of 19:03, 6 May 20153,516 × 2,300 (1.57 MB)Natuur12 (talk | contribs)Transferred from Flickr via Flickr2Commons

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