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首页> 外文期刊>Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences >A 'bloat-and-float' taphonomic model best explains the upside-down preservation of ankylosaurs
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A 'bloat-and-float' taphonomic model best explains the upside-down preservation of ankylosaurs

机译：“膨胀和浮点”绘制模型最能解释骨头侧的颠倒保存

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摘要

It is widely held that, within the Cretaceous fluvial and marine deposits of North America, ankylosaur remains are typically preserved upside-down; however, this anecdotal observation has yet to be substantiated. Likewise, none of the various hypotheses that purport to explain the frequent occurrence of overturned ankylosaurs has been tested either. This study is the first to apply quantitative and modeling approaches to address these shortcomings. We find strong statistical support for the dominance of upside-down occurrences, and favour a "bloat-and-float" model to account for them. According to this model, ankylosaur carcasses become reworked into fluvial or marine settings where they bloat and overturn prior to their final deposition. Differential floating behaviour between ankylosaurids and nodosaurids may have implications regarding the occurrence of the latter in marine depositional environments. This consideration of ankylosaur taphonomy might similarly help to explain the purported frequency of overturned glyptodonts, which share a similar bauplan with ankylosaurs.
机译：众所周知，在北美的白垩纪河流和海洋沉积物内，肩带通常保持颠倒;但是，这种轶事观察尚未得到证实。同样，旨在解释频繁发生翻倒的肩带的各种假设都没有得到测试。本研究是第一个应用定量和建模方法来解决这些缺点的方法。我们发现强烈的统计支持对颠倒的出现的主导地位，并赞成“膨胀和浮动”模型来解释它们。根据该模型，Ankylosaur尸体在河流或海洋环境中重新加工，在最终沉积之前膨胀并翻转。肩胛骨和乳酮之间的差异浮动行为可能对海洋沉积环境中后者的发生可能具有意义。这种窦龙Taphonomy的考虑可能同样有助于解释普遍的Glyptodonts的常见频率，其共享类似的鲍瓦艇与肩带。

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