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The atlas · Interior · Magnetism

Outline · being written

When the field flips

How the field reverses, how often, and how the rocks record it.

The working diagram A timeline of normal and reversed field, with the sea-floor stripes it left.
Page type
A lesson, led by a working diagram
Collection
Interior, magnetism
When
About 170 million years ago to now, in the Jurassic, Cretaceous, Paleogene, Neogene and Quaternary. The finished piece will give dates from its sources.
Status
Planned and outlined. Every fact in it will be checked against a named source and listed on Sources before it goes up.

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