Earth's internal temperature increases between the boundary of the upper mantle and the bottom of the lower mantle, ranging from around 1,800 to 6,700 degrees Fahrenheit (1,000 to 3,700 degrees ...

Duration of the English Coal Fields—The Internal Temperature of the Earth. September 11, 1869. Share on Facebook. Share on Twitter. Share on Reddit. Share on LinkedIn. Share via Email. Print.

PROF. MOHR, of Bonn, has contributed to the Neues Jahrbuck für Mineralogie, &c. (1875, Heft 4), a very important paper on the causes of the internal heat of the earth. After indicating some of ...