High-Resolution of Geomagnetic Reversals from Plio-Pleistocene Sediments in Southern California

以前的磁地层学工作已经(1)在南部死亡谷的湖泊沉积物中确定了Olduvai磁时线的上下边界，(2)在莫哈韦沙漠Barstow附近的古马尼克斯湖中发现了可能是Jaramillo时线的类似边界，(3)在文图拉盆地的Pico组中确定了可能是Mammoth和Kaena事件。PI将以高分辨率对这些反转层进行采样，以确定它们的时间、化学和地磁特征。目前有高保真的磁场记录，显然包括长期变化和地磁倒转。

Previous magnetostratigraphic work has (1) located the upper and lower boundaries of the Olduvai magnetic Chron in lake sediments from Southern Death Valley, (2) found similar boundaries of what is probably the Jaramillo Chron in ancient lake Manix near Barstow in the Mojave desert, and (3) located what may be the Mammoth and Kaena events in the Pico formation of the Ventura Basin. The PI will sample these reversal horizons in high resolution to determine their temporal, chemical,a nd geomagnetic characteristics. High-fidelity records of the field are present, apparently including secular variations and geomagnetic reversals.