The QCC Posted March 27, 2016 Share Posted March 27, 2016 Thin sections made from Rugose Coral sent to me by forum member CanadaWest..There are seven corals in this collection.The thin sections were photographed using a polarizing microscope or a stereo microscope with a simple polarizing kit.I was not successful in making good thin section from all of the specimens so some photos are not the best possible. This post is in four parts. Part 1 Coral 2 Rugose Coral, Carboniferous, Livingston form., Invemere, BC Photo 2 - The initial polishing of a transverse section did not look promising, but a detail (Photo 3) looked interesting Photo 4 is the same transverse section with further polishing and photographed with a stereo microscope with the Darkfield stop in place. Photo 5 is a detail at 15x magnification with crossed polars only. The Rugose Corals are also presented as web slide shows. Link to comment Share on other sites More sharing options...
The QCC Posted March 27, 2016 Author Share Posted March 27, 2016 Part 2 Coral 3 Rugose Coral, Dibunophyllum, Carboniferous, Sappington form., Montana Photos 8 & 9 are from a previous post. On closer observation I noted what appears to me a distorted structure in the centre of the coral. Photo 10 & 11 are from a different slice of the same coral further down the body. The section also shows the distorted centre area. I do not know the significance of the distortion. Link to comment Share on other sites More sharing options...
The QCC Posted March 27, 2016 Author Share Posted March 27, 2016 Part 3 Coral 4 Rugose Coral, Caninia Carboniferous, Brown Cty, TX. Del Rio formation. Photo 2 a full scan of a cross section. Photos 3 & 4 show details of the internal stucture as viewed through a lambda filter. The lambda filter shifts the colours of the minerals that fill what was the soft part of the coral into a stained glass effect. photos 1,2 3 Link to comment Share on other sites More sharing options...
The QCC Posted March 27, 2016 Author Share Posted March 27, 2016 Part 4 Coral 5 Rugose Coral, Smithiphyllum, Devonian,Wadleigh Formation, Coronadas, Alaska Photo 6 to 9 a full scans of cross sections cut from different locations along the coral. All for parts of this post are presented as web slide shows. Link to comment Share on other sites More sharing options...
sdsnl Posted March 27, 2016 Share Posted March 27, 2016 Those are very beautiful! Link to comment Share on other sites More sharing options...
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