File:Ogygopsis klotzi fossil trilobite tail (Burgess Shale Formation, Middle Cambrian; Mt. Stephen, British Columbia, southwestern Canada) (15083634948).jpg

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Ogygopsis klotzi pygidium (tail) (2.1 cm across) in slightly calcareous mudshale. From the “Ogygopsis beds” of the Burgess Shale Formation on Mt. Stephen, British Columbia, southwestern Canada (vintage specimen).

The Burgess Shale Formation in the Canadian Rockies of British Columbia is world-famous for its abundance of soft-bodied fossils. Mt. Stephen is a classic fossil locality to the south of the best Burgess Shale quarries. The rocks of Mt. Stephen are also Burgess Shale Formation, but soft-bodied fossils are far less common. The most common fossils seen in rocks on the slopes of Mt. Stephen are decent-sized specimens of Ogygopsis klotzi trilobites. Disarticulated pygidia, cranidia, thoracic segments, and partially- to fully-articulated specimens are common in these rocks. The area is now a national park, but vintage specimens are sometimes available for examination.

The fossil shown here is an Ogygopsis tail + three thoracic segments. The larger slab of which this is a part has many other fossils, including additional Ogygopsis material, other polymeroid trilobites, orbiculoid brachiopods, and Selkirkia worm tubes.
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Source Ogygopsis klotzi fossil trilobite tail (Burgess Shale Formation, Middle Cambrian; Mt. Stephen, British Columbia, southwestern Canada)
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15083634948. 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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current18:56, 6 May 2015Thumbnail for version as of 18:56, 6 May 20153,072 × 2,016 (3.71 MB)Natuur12 (talk | contribs)Transferred from Flickr via Flickr2Commons

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