Chemostratigraphy in the Swedish Upper Ordovician: Regional significance of the Hirnantian delta C-13 excursion (HICE) in the Boda Limestone of the Siljan region
Samples from the Boda Limestone and immediately overlying strata at Osmundsberget in de Siljan region have produced an excellent Hirnantian isotope excursion (HICE) curve, in which the excursion interval is about 22 m thick and the HICE reaches maximum delta C-13 values of between +5 parts per thousand and +6 parts per thousand. Both the HA and HB stratigraphic unconformities are recognized in the