John Livermore, an exploration geologist whose discovery of minuscule but highly valuable particles of "invisible gold" in Nevada in the early 1960s set off a modern-day gold rush in the state, has died. He was 94.
Livermore died Feb. 7 at his Reno home of cancer, said Andy Wallace, his longtime business partner.
"He was probably the most successful exploration geologist in the last half of the 20th century," said Wallace, chief executive of Cordex, the company Livermore founded in 1970 for mine exploration.
His impact on the industry was enormous, said John Dobra, a professor of natural resource economics at the University of Nevada at...