Ratcliff C D, Geissman J W, Perry F V, Crowe B M, Zeitler P K
Science. 1994 Oct 21;266(5184):412-6. doi: 10.1126/science.266.5184.412.
Late Miocene (about 8.65 million years ago) mafic intrusions and lava flows along with remagnetized host rocks from Paiute Ridge, southern Nevada, provide a high-quality paleomagnetic record of a geomagnetic field reversal. These rocks yield thermoremanent magnetizations with declinations of 227 degrees to 310 degrees and inclinations of -7 degrees to 49 degrees , defining a reasonably continuous virtual geomagnetic pole path over west-central Pacific longitudes. Conductive cooling estimates for the intrusions suggest that this field transition, and mafic magmatism, lasted only a few hundred years. Because this record comes principally from intrusive rocks, rather than sediments or lavas, it is important in demonstrating the longitudinal confinement of the geomagnetic field during a reversal.
晚中新世（约865万年前），内华达州南部派尤特岭的镁铁质侵入体和熔岩流，以及被重新磁化的围岩，提供了一次地磁场反转的高质量古地磁记录。这些岩石产生的热剩磁偏角为227度至310度，倾角为-7度至49度，在西太平洋中部经线上定义了一条相当连续的虚拟地磁极路径。对侵入体的传导冷却估计表明，这次场转变以及镁铁质岩浆活动仅持续了几百年。由于这一记录主要来自侵入岩，而非沉积物或熔岩，因此对于证明反转期间地磁场的纵向限制具有重要意义。
