Art that is made by shaping the land itself or by making forms in the land using natural materials like rocks or tree branches. Earthworks range from subtle, temporary interventions in the landscape to significant, sculptural, lasting alterations made with heavy earth-moving machinery. Some artists have also brought the land into galleries and museums, creating installations out of dirt, sand, and other materials taken from nature. Earthworks were part of the wider conceptual art movement in the 1960s and 1970s. Also called Land Art or Earth Art.