Here is a decorative ammonite slab from the Jurassic of Switzerland featuring several specimens of the species Stephanoceras humphriesianum. The largest ammonite on this cluster measures approximately 56 mm. |
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| | Location: | Sissach, Kt. Baselland, Swiss | |
| Size of Matrix: | about 160 x 86 x 109 mm |
| Age: | Middle Jurasic, Bajocium , Passwang Formation, Sissach Member (about 164, Mill. Jears) |
