Noun
earth art (uncountable)
Synonym of land art
Just as the development of earth art and installation art stemmed from the idea of taking art out of the galleries, the basis of my involvement with public art is a continuation of wall drawings. Sol LeWitt
Likely, these artworks could have been created and installed in the vein of the Earth Art (Land Art) Movement which emerged in the 1960s and 70s. Source: Internet