In the eastern part of the beach of Lapari there are the known septaria of Deba. The reef may have about 15 m, but it is not distinguished from the rest of the marly formation of the black flysch of Deba beach. The first publications on the septaria of Deba date from 1958. The upper part of the site has been totally destroyed by works, and in the part of the beach, foreign and local collectors collected numerous specimens. Currently this area has been declared of special protection within the coastal biotope Deba-Zumaia so the collection of septaria is absolutely prohibited [link]. Polished section.

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