A remarkably large, derived, metamorphic clast of Palaeozoic aspect weighing approximately 20 kg was recently recovered from a plant debris bed occurring in the Lower Cretaceous (Barremian), fluvial, lacustrine and terrestrial Wessex Formation exposed on the south-west coast of the Isle of Wight, southern England. It is interpreted as a dropstone transported in tree roots from a source locality on the Cornubian Massif. During the Early Cretaceous the eastern extremity of this has been estimated to be some 110 km to the west of the collection locality. Polished extrabasinal clasts of similar lithology are commonly encountered in the Wessex Formation but all recorded to date are much smaller and the majority have been interpreted as gastroliths, although some must be dropstones. The occurrence of this clast demonstrates long distance, floating transport of large root systems and therefore the potential to transport, over long distances, some of the logs and dinosaur remains encountered in the Wessex Formation. Direct evidence for this has been lacking until now and it suggests that some of the dinosaurs recorded from the Wessex Formation of the Isle of Wight may not have been floodplain residents or visitors.

最近从位于马恩岛西南海岸的下白垩统（巴雷米亚），河流，湖相和陆生的威塞克斯地层中的植物残骸床中发现了一个重约20 kg的古生代方面很大的变质岩屑。怀特，英格兰南部。它被解释为是从Cornubian断层上的某个源头在树根中运输的浮石。在白垩纪早期，据估计该岩体的东端距离采集点西侧约110公里。韦塞克斯地层通常会遇到类似岩性的抛光基底外岩屑，但迄今为止记录的所有岩屑都小得多，大多数已被解释为胃石，尽管其中有些必须是落石。这种碎片的出现表明距离很远，大型根系的漂浮运输，因此有可能长距离运输韦塞克斯地层中遇到的一些原木和恐龙。到目前为止，尚缺乏直接证据，这表明从怀特岛的威塞克斯地层记录的某些恐龙可能不是洪泛区居民或游客。