The mass occurrence of turritelline gastropod shells from the Lower Miocene of southern Germany allows for detailed studies of their palaeoecology, transport mechanisms, preservation potentials and the reconstruction of nutrient regimes. Changes in the fabric of the gastropod‐dominated beds are used to reconstruct a generally deepening environment corresponding to the Lower Miocene transgression within the Upper Molasse Sea of the North Alpine Foreland Basin. The sedimentary succession ranges from chaotically arranged, densely packed and near‐shore transported; wave‐influenced deposits showing bimodal shell orientations; more widely dispersed shells showing a uni‐directional orientation; and dispersed shells showing diverse orientations. The shells often show damage to the apex and aperture though it is not clear whether this is due to predation events, pagurisation or abrasion due to transport. An outstanding feature is the replacement of aragonite shells by calcite leading to internal vugs as well as modulating the outer shell surface morphology. The high density of turritelline gastropods indicates a nutrient‐rich palaeoenvironment at the northern edge of the Molasse Sea.

中文翻译：

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来自德国南部下中新世的Turritelline质量堆积：对北高山前陆盆地内潮流和养分传输的影响

来自德国南部下中新世的Turritelline腹足动物壳的大量出现，可以对其古生态，运输机制，保存潜力和营养体系的重建进行详细研究。腹足动物为主的床的结构变化被用来重建与北高山前陆盆地上莫拉塞海中下中新世海侵相对应的普遍加深的环境。沉积演替的范围从混乱的排列，密集的堆积到近岸的运输。受波影响的沉积物显示出双峰壳向; 散布更广的壳体显示出单向方向；分散的炮弹显示出不同的方向。尽管尚不清楚这是由于捕食，运输或磨损造成的，但贝壳经常对顶点和孔造成损害。一个突出的特点是用方解石代替了文石壳，导致了内部孔洞以及调节了外壳的表面形态。Turritelline腹足动物的高密度表明，在莫拉塞海北部边缘营养丰富的古环境。