查看文章

A valuable overview of the lithostratigraphical variation of the Purbeck Limestone Group across its Dorset type-area (within the Wessex sub-basin of northern Europe) is gained from new logging of coastal sections in west and central parts of south Dorset, and re-evaluation of previous detailed work further east. An adapted lithostratigraphical classification is presented, which divides the group into the two existing formations (Lulworth and Durlston), five new members, and fifteen or so traditional beds. The members were set up in the more representative west and central parts of the basin; they have been designed to reflect broad sedimentary variations in the group, and thus are useful for inland mapping and will be helpful for palaeogeographical analysis. The beds are the traditional minor divisions of the group conceived in the last century, which have been promoted recently by some authors to member status. The …