Knowledge about geomagnetic field directions and intensity prior to direct observations comes from archeo - and
paleomagnetic data.
Distribution of available Holocene archeo - and
paleomagnetic data (status as described by Donadini et al. 2009 and Korte et al. 2011).
We first discuss important archeo - and
paleomagnetic data characteristics.
A number of new millennial - scale geomagnetic field reconstructions have been published over the last years, based on improved global archeo - and
paleomagnetic data compilations.
Further advances in understanding the acquisition of magnetisation in archeo - and
paleomagnetic data, continuing development of improved laboratory procedures and further investigations of suitability and appropriate scaling of sedimentary relative intensity records will help to reduce uncertainties in the data, and consequently also in the models.
That estimate is backed up by
paleomagnetic data, which show that this portion of the reef must have formed after Earth's magnetic poles last reversed, some 790,000 years ago.
Paleomagnetic data support this interpretation, says Steinberger.
Not exact matches
The U-Pb
data, coupled with
paleomagnetic constraints, provide an age range from to Ma.
A large number of such
data have been produced over the past decades in
paleomagnetic laboratories around the world, so that the amount of available
data is getting large enough to allow for global inversion models of the Holocene magnetic field.
The approximate orientations and locations of Silurian continents can be reconstructed using a combination of
paleomagnetic, paleoclimatic, and biogeographic
data.