Superb Bactrocrinites Bundenbach Crinoid

Bactrocrinites jaeckeli

Cladida, Dendrocrinidae

Geological Time: Lower Devonian, Seigenian / Emsian Stage

Size (25.4 mm = 1 inch): Calyx and arms: 16 mm across by 38 mm long , 47 mm stem attached on a 107 by 105 mm matrix

Fossil Site: Hunsruck Slate, Bundenbach Germany

Code: AAF404

Price: $115.00 - sold


Description: Well-preserved example of a superbly-preserved, fully- articulated Cladid crinoid.. The Hunsruck slate is famous for its fossils, many of which have pyritization present. Rapid burial and pyritization was what led to the many wonderful examples of early Devonian life from the region. The chemistry of the silt was such that low organic content and high levels of iron and sulfur allowed the pyrite to diffuse into the tissues rather than be deposited in the sediment. The mudstones were metamorphosed into slate during the Carboniferous. The slate was quarried for roofing tiles, and the quarrymen would save the fossils for later sale. Now that the quarries are no longer open, future supplies of these wonderfully-preserved benthic organisms will only come from existing collections. The pyritization serves as an artistic counterpoint to the rich black slate, making for a truly striking display piece.

Crinoids Purchase Information

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