Echoes from the Posidonia Sea

A warm Jurassic sea once covered Franconia, and it left behind a surface that looks almost designed: spirals upon spirals, ribbed shells nested together like a fossil tide-line frozen in stone. Large ammonite slabs from Drügendorf have an immediate, graphic impact. They are both scientific record and natural ornament, a cross-section through an ancient seafloor where these cephalopods lived, died, and accumulated.

 This impressive limestone slab preserves numerous ammonites with clearly legible sculpture and a range of sizes, creating a dense “pavement” effect that is characteristic of Drügendorf’s ammonite-rich horizons, often referred to by collectors as an “Ammoniten-Seife” due to the sheer concentration of shells. Geological context:

During the Malm (Upper Jurassic), much of Bavaria lay beneath a shallow shelf sea in a tropical climate, accumulating limestones, marls, and dolomites that now form the dramatic cliffs and plateaus of the Fränkische Alb.

 The Upper Jurassic time interval spans approximately 163.5 to 145 million years ago on the modern international timescale.