Start Forms the basis of archaeomagnetic dating

Forms the basis of archaeomagnetic dating

The extent of documentation varied considerably in 'historical' cultures and the information that survives is determined by a variety of factors.

Culture history and diffusionism may - with hindsight - seem excessively preoccupied with classification and social evolution, and to have applied unsophisticated historical interpretations instead of asking fundamental questions about human behaviour.

ESR does not release trapped electrons, but subjects them to electromagnetic radiation in a magnetic field, which causes electrons to resonate and absorb electromagnetic power.

The strength of resonance reflects the number of electrons that have become trapped since the crystals were formed.

Variations in climate produced observable differences in the thickness of sediments, and, like the patterns of variation in tree rings, this allows matches to be made between deposits in separate lake beds.