Double Negative is a piece of land art located in the Moapa Valley on Mormon Mesa (or Virgin River Mesa) near Overton, Nevada. Double Negative was created in 1969 by artist Michael Heizer. The work consists of a long trench in the earth, 30 feet (9 m) wide, 50 feet (15 m) deep, and 1500 feet (457 m) long, created by the displacement of 244,000 tons of rock, mostly rhyolite and sandstone. Two trenches straddle either side of a natural canyon (into which the excavated material was dumped). The "negative" in the title thus refers in part to both the natural and man-made negative space that constitutes the work. The work essentially consists of what is not there, what has been displaced.