Acknowledgements
We thank Kristina Kdyrova for helping with sample preparation and measurements. Pruhonice Paleomagnetism Laboratory is thanked for allowing us to measure the cave sediment samples. Support for GK came from the Czech Science Foundation 20-08294S, 20-00892L, Ministry of Education, Youth and Sports LTAUSA 19141, and institutional support RVO 67985831.
This study is dedicated to our co-author Jaroslav Kadlec, who passed away recently.