On the opposite side the last models and interpretation of the Variscan structure, based on dating,
paleomagnetic, structural and seismic data (Schulman et al., 2005; Finger et al, 2000; Edel et al., 2003; Oncken, 1997; Aric et al., 1997, and other), gave chance to better understanding of their deeper parts and origin.
Recrystallization also results in changes in crystal structure, isotopic composition, and
paleomagnetic properties (e.g., Machel, 1997).
These distinctive assemblages together with the
paleomagnetic signatures of relevant rocks permitted the paleogeographic reconstruction of the Iapetus paleo-ocean (Harper et al.
Moreover, the
paleomagnetic data should reveal that the continents travel in spurts rather then drift at the same speed.
(1999):
Paleomagnetic and palynological analyses of Albian to Santonian strata at Bayn Shireh, Burkhant, and Khuren Dukh, eastern Gobi Desert, Mongolia.
A promising new project, called "Taking the pulse of planet Earth", would address earth systems through time by undertaking a multi-parameter analysis of global magmatism, including spatial distribution, ages, periodicities, rates, volume estimates, geochemical fluxes to atmosphere and hydrosphere, tectonic and geodynamic settings, sequence stratigraphic framework, structural trends, evolving major- and trace-element compositions, evolving isotopic ratios,
paleomagnetic data, paleo-intensity data, paleogeography, and ore deposits.
These terranes have geochemical and
paleomagnetic data compatible with an origin as seamounts above the Yellowstone plume.
Paleomagnetic data -- which indicate where rocks form in relation to the Earth's magnetic poles -- constitute another pillar of Mason's argument.
(1996): The evolution of Pangaea:
paleomagnetic constraints from the Southern Alps, Italy.
A complete record of mafic magmatism through time and space (spatial distribution, ages, periodicities, rates, volume estimates, estimated geo-chemical fluxes to atmosphere and hydrosphere, tectonic settings, sequence stratigraphic framework, structural trends, evolving major and trace element compositions, evolving isotopic ratios,
paleomagnetic information, paleo-intensities, associated ore deposits, etc.) provides critical constraints on numerous first-order questions about the past and present evolution of our planet.