"Then the Lord rained upon Sodom and upon Gomorrah brimstone and fire from the Lord out of heaven; And he overthrew those cities, and all the plain, and all the inhabitants of the cities, and that which grew upon the ground" (Genesis 19:24-25 KJV).

98% pure sulfur was found to be rained down on the cities of Sodom and Gomorrah turning it into ashes; unlike any other sulfur found on Earth. Geothermal activity near volcano's produce about 40% sulfur, but is of a different kind. There is no geothermal activity around these cities of Sodom and Gomorrah.