10.6084/m9.figshare.3453722.v1 Michael A. Pointon Michael A. Pointon David M. Chew David M. Chew Maria Ovtcharova Maria Ovtcharova George D. Sevastopulo George D. Sevastopulo Bernard Delcambre Bernard Delcambre High-precision U–Pb zircon CA-ID-TIMS dates from western European late Viséan bentonites Geological Society of London 2016 stratigraphical age 100 ka Milankovitch cycle cycle periodicity values bentonite Palaeozoic glaciation Milankovitch frequency Midland Valley Warnantian parasequences exhibit Mississippian time scale Warnantian times zircon ionization mass spectrometry dates Clyde Plateau Volcanic Formation Vis éan Geology 2016-06-21 11:38:17 Dataset https://geolsoc.figshare.com/articles/dataset/High-precision_U_Pb_zircon_CA-ID-TIMS_dates_from_western_European_late_Vis_an_bentonites/3453722 <p>Three new U–Pb zircon chemical abrasion isotope dilution thermal ionization mass spectrometry dates obtained from late Viséan Belgian bentonites are reported and are used to estimate the periodicity of early Warnantian shallowing-upwards carbonate parasequences that are interbedded with the dated bentonites. Early Warnantian parasequences exhibit mean cycle periodicity values that are consistent with the <em>c</em>. 100 ka Milankovitch cycle, which is the dominant Milankovitch frequency recognized from recent Pleistocene glacial records, and thus strengthen the arguments for (1) these sedimentary cycles being of glacio-eustatic origin and (2) the initiation of the main phase of late Palaeozoic glaciation before the start of or during earliest Warnantian times. The new dates also provide additional high-precision age constraints for the improved calibration of the Mississippian time scale. Using the new dates, the stratigraphical age of the Clyde Plateau Volcanic Formation, Midland Valley of Scotland, is revised from Holkerian to early Asbian. </p>