File:Kirkidium laqueatum pentamerid brachiopods in limestone (bioherm facies of the Wabash Formation, Ludlovian Series, Upper Silurian; Pipe Creek Junior Quarry, Swayzee, Indiana, USA) 2 (17152125165).jpg

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Kirkidium laqueatum (or Kirkidium cf. K. laqueatum) pentamerid brachiopods in limestone from the Silurian of Indiana, USA.

Pentamerids are usually large brachiopods that are moderately common in Silurian dolostones of America's Midwest. The calcite shell has usually dissolved away, leaving an internal mold. The pentamerid specimens shown above have preserved calcite shells because the host rocks have not been dolomitized.

Classification: Animalia, Brachiopoda, Rhynchonellata (Articulata), Pentamerida, Pentameridae

Stratigraphy: bioherm facies of the Wabash Formation, Ludlovian Series, Upper Silurian

Locality: upper part of the Pipe Creek Junior Quarry, Swayzee, east-central Indiana, USA
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Source Kirkidium laqueatum pentamerid brachiopods in limestone (bioherm facies of the Wabash Formation, Ludlovian Series, Upper Silurian; Pipe Creek Junior Quarry, Swayzee, Indiana, USA) 2
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/17152125165. 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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