Earth's magnetic field has flipped dozens of times in the past 2.5 million years, with north becoming south and vice versa. Scientists know the last reversal took place during the Stone Age, but they have little information about the duration of this phenomenon and when the next "flip" might...
Although no detailed correlation can be established between the two sections, they both encompassed the Matuyama-Brunhes (M-B) reversal. Stepwise alternating field (AF) and thermal demagnetization in air and in vacuum accompanied by investigations of the rock magnetic properties allowed us to identify...
The oldest (sandy) loess, located on top of the terrace dated at about 1 Ma, was deposited at the end of the Lower Pleistocene before the B-M magnetic reversal (Antoine et al., 2000, 2003a). The St. Vallier loess, near Lyon, is among the oldest in Europe, having been dated to ...
with sedimentation rates of at least 5 cm/ky, for which there exists the following dating means: radiocarbon dates for mid and low latitudes sediment cores, and SST or magnetic records for sediment cores located poleward of ~38°N and ~40°S. New cores...
Coinciding with global warming, Arctic sea ice has rapidly decreased during the last four decades and climate scenarios suggest that sea ice may completely disappear during summer within the next about 50–100 years. Here we produce Arctic sea ice biomar
In addition to an expected reduction in both recurrent and non-recurrent geo- magnetic storms during the MM, the expected poleward motion of the nominal auroral oval position may further help explain the dearth of auroral reports from that period for all but the most northerly locations15. ...
The evolution of the Earth’s magnetic field during the last reversal, the Matuyama-Brunhes 780 kyr ago, was analyzed from the IMMAB4 (up to its maximum degree 4). The location of the ED during the transition is shown in Figure 2a along with the normalized (dividing by the maximum value...