EnergyGeologic mapsInternet Temperature of rocks at 3.5 kilometers below the surface in the continental US April 29, 2016 Alex This post may contain affiliate links. As an Amazon Associate, we earn from qualifying purchases. Related Posts:Maps of the Great LakesHow is climate will change in the U.S. (2030 - 2100)?Earth's surface visualizedHuman Climate Niche MappedDifference Between Highest and Lowest Temperatures…Similar sized countries over US States and Canadian…Official gems, minerals and rocks symbols of every…Average annual temperature