Cretaceous long normal
The Cretaceous long normal was the long period of stability in the Earth's magnetic field when no field reversals occurred. It lasted between 120 and 83 million years ago, during the Jurassic and Cretaceous periods.
The Cretaceous long normal was the long period of stability in the Earth's magnetic field when no field reversals occurred. It lasted between 120 and 83 million years ago, during the Jurassic and Cretaceous periods.