High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation

Late Devonian time was a period of rapid upheaval in the Earth system, including climate change, sea level changes, widespread ocean anoxia, and Frasnian-Famennian mass extinction; cause(s) these changes remain(s) uncertain. The Lennard Shelf Canning Basin Western Australia contains carbonate reef sections spanning much Epoch has been sampled for paleomagnetic analysis with studies by Hansma colleagues 2015 Playton 2016. However, previous directions were scattered their use magnetostratigraphy questioned. Here, rock magnetic data late drill-core from analyzed. Three magnetostratigraphic interpretations made using different paleopoles that showed good correlation each other earlier Additionally, revealed samples contain various mixtures detrital diagenetic minerals, former which should be viable recorders primary signatures. Even phases, often noisy produced ambiguous polarity assignments, likely due to anomalously weak field. Because this ambiguity absence robust paleopole, broader correlations critical time-period will difficult without additional Period. Expanded interval could eventually shed light on timing, causes, rates extinction environmental shifts Epoch.