High-resolution palaeosecular variation in northern Europe during the last 3200 years

Abstract

Variations in the declination, inclination and relative palaeointensity of Earth's magnetic field during the last 3200 yr have been recorded from a sequence of annually laminated sediments in Lake Pohjajärvi (lat 62°N), Central Finland. The magnetic mineralogy is uniform, with only small variations in concentration of magnetite of pseudo-single-domain (PSD) grain size. The variations in direction were found to be very similar to records reconstructed from other lakes in Finland and northwest Russia, while the relative palaeointensity curve can be correlated accurately with archaeomagnetic data from Central Europe.