The stratigraphy of the Upper Ordovician carbonate mounds in the subsurface of Gotland
In a revision of the stratigraphic classification of the subsurface Upper Ordovician succession of Gotland, the terms Lower and Upper Ostersjo Limestone are rejected and replaced by the Slandrom Limestone and the File Limestone, respectively. Two mound generations are recognized, the Rakveran-Nabalan Liste mounds and the Pirguan Klasen mounds, the latter being by far the most common. Both occur no