Purchase an Atlas from Geochron.com, and receive a free one year subscription to the Premium Layer of your choice!

The coupon code is valid for any Geochron Premium Layer for 90 days after purchase of the Geochron Atlas.

The coupon code will be delivered to the email address submitted when you purchased the Geochron.  Once installed, use the same email address to register your Geochron, and use the coupon code at checkout.

Atmospheric Layer
Earthquakes and Volcanoes
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