Abstract
The present paper is a continuation of the earlier paper suggesting that heat flow values taken all over the world seem to be correlatable with age of the latest phase of igneous activity of the region. This relation has been further studied for eighty reliable values of heat flow from the continents of North America and Australia. The heat flow values all over the world plotted against corresponding age suggest an exponential decay relationship. The value of “heat flow decay rate” found is 4.31 ± 0.7 · 10 −10 which is very close to that of 40 K. This result points to the possibility that 40K has played a significant role as heat producing element for the earth.
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