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I had seen the Stratigraphic Table of Germany 2016, where this formation is considered the same as Posidonienschiefer Formation, an external invasion of Shale on the Ällgau Formation profile. I let this to the admins. Also recommend to put all the names of the Posidonia: Sachrang Formation, Posidonia Shale, Posidonienschiefer Formation, Schwarzerschiefer and Ölschiefer Formation, mostly to evade confusion. I ask Elmidae if can put this on interest of an admin. ( Yewtharaptor ( talk) 16:48, 21 October 2020 (UTC) reply

@ Yewtharaptor: Considering that you wrote the entirety of this article, feel free to merge it as you see fit. Hemiauchenia ( talk) 21:15, 28 October 2020 (UTC) reply

@ Hemiauchenia: Can some admin fuse the History of both articles? Or it wouldn´t be necessary? Yewtharaptor ( talk) 00:39, 29 October 2020 (UTC) reply

Move back to Posidonia Shale

Posidonia Shale is by far the WP:COMMONNAME for this geological unit in English, there are almost no results for "Sachrang Formation" when searching on scholar, but thousands for "Posidonia Shale". Hemiauchenia ( talk) 02:57, 4 June 2021 (UTC) reply