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In page Sculpture:

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Site specific and environmental art works are represented by artists: Andy Goldsworthy, Walter De Maria,[2] Richard Long, Richard Serra, Robert Irwin,[3] George Rickey and Christo and Jeanne-Claude led contemporary abstract sculpture in new directions. Artists created environmental sculpture on expansive sites in the 'land art in the American West' group of projects. These land art or 'earth art' environmental scale sculpture works exemplified by artists such as Robert Smithson, Michael Heizer, James Turrell (Roden Crater). Eva Hesse, Sol LeWitt, Jackie Winsor, Keith Sonnier, Bruce Nauman and Dennis Oppenheim among others were pioneers of Postminimalist sculpture.[citation needed]