Paleosecular Variation Constraints on Geomagnetic Field Morphology at ca. 1100 Ma. - Zhao, Hanqing; Zhang, Shihong; Ding, Jikai; Ren, Qiang; Li, Haiyan; Bian, Weiwei; Yang, Tianshui; Wu, Huaichun (Geophysical Research Letters, 2026)