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Dictyonema Shale

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Dictyonema Shale 

second stratigraphic horizon from the bottom of the Silurian deposits, found in Leningrad Oblast and the Estonian SSR. It is represented by clay shales that are rich in organic matter and contain graptolitic fossils (Dictyonema flabelliformis Hall) and more rarely brachiopod fossils (O bolus appolinis Eichw). Thickness varies from 0.12 to 4 m. The Dictyonema shale corresponds to the upper part of the Tremadocian series.



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Garin size analysis and mineralogy of the Tremadocian Dictyonema shale in Estonia // Oil Shale.
86) During the implementation of the Soviet uranium project, a top secret uranium factory (Kombinat No 7) was erected in Sillamae, and a test facility, officially called paint factory (krassilnaja fabrika), was established in Narva to test and develop the technology of extracting uranium from the Dictyonema shale found in north-eastern Estonia (the average uranium content of Dictyonema shale is 0.
In the world OS overviews, the Estonian kukersite and Dictyonema shale reserves are assessed on the basis of their energetic value.
 
 
 
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