Buried beneath an ancient volcanic crater on the Nevada Oregon border sits an enormous deposit of lithium rich clay. Scientists now think this quiet landscape may hold enough lithium to influence the global battery market for decades.

A new study argues that McDermitt caldera may host about 20 to 40 million metric tons of lithium, likely the largest deposit yet identified.

Using the recent United States’ average contract price for lithium carbonate, about 37,000 dollars per ton, that estimate comes out to be nearly $1.5 trillion.