Geothermal data shows a heat flow of ~ 30 40 mW / m 2, which indicates cold, strong mantle.
2.
The National Geothermal Data System makes use of the large collection of hard copy documents stored in state geological survey archives.
3.
The DOE Geothermal Technologies Program ( part of the American Recovery and Reinvestment Act of 2009 ) provided funding to establish the National Geothermal Data System ( NGDS ).
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