The Dark Tower was released by Stephen King.
Thomas Edvard `` Tom '' Krogh , FRSC -LRB- 1936 -- April 29 , 2008 -RRB- was a geochronologist and a former curator for the Royal Ontario Museum .. FRSC. Royal Society of Canada. geochronologist. Geochronology. curator. curator. Royal Ontario Museum. Royal Ontario Museum. He revolutionized the technique of radiometric uranium-lead dating with the development of new laboratory procedures and analytical methodologies .. radiometric. Radiometric dating. uranium-lead dating. uranium-lead dating. His discoveries have yielded an unprecedented level of precision in the dating of Precambrian rocks .. Precambrian. Precambrian. Krogh 's techniques have become the international de facto standard .. The application of these techniques has provided a detailed understanding of the evolution of the Earth 's Precambrian shield areas .. Precambrian. Precambrian