different between geochronology vs magnetochronology

English

geo- +? chronology

geochronology (countable and uncountable, plural geochronologies)

(uncountable) The science of dating samples of rock or sediment.
Geochronology allows us to see more precisely how the world has evolved.
(countable) Any one of the methods by which the age of different samples of rock can be determined.
The history of the East–Antarctic shield has been uncovered through uranium–lead geochronology.
(uncountable) The division of ancient time into named subdivisions / periods

magneto- +? chronology

magnetochronology (countable and uncountable, plural magnetochronologies)

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