Graphoceras concavum (Sowerby 1815)
By Ludwigia
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The index fossil for - you guessed it - the Concavum Zone, Upper Aalenian, Middle Jurassic. Found in the "Geisingen-Oolith" at the clay pit in - where else? - Geisingen. 6cm.
From the album:
Middle Jurassic Ammonites from Southern Germany
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