The combined use of accurate radiometric dating and magnetic stratigraphy can be applied
to define the main stages of the building of oceanic volcanic islands. This method has been
successfully applied on the island of El Hierro, the westernmost island of the Canaries
Archipelago. For the emerged part of this island, built in the last 1.2 Ma, magnetic
stratigraphy and mapping show the presence of four consecutive subchrons. K-Ar dating of
eighteen samples in stratigraphic sequences using an unspiked technique produced ages …

The combined use of accurate radiometric dating and magnetic stratigraphy can be applied
to define the main stages of the building of oceanic volcanic islands. This method has been
successfully applied on the island of El Hierro, the westernmost island of the Canaries
Archipelago. For the emerged part of this island, built in the last 1.2 Ma, magnetic
stratigraphy and mapping show the presence of four consecutive subchrons. The ages show
that the magnetic polarity zones correlate to the upper part of the Matuyama and to the …