[5] From 1966 to 1968, Oppenheim's ephemeral earthworks included shapes cut in ice / snow, such as «Annual Rings» (1968), a series
of rings carved in the snow on the U.S.A. / Canada border, [6] and «Gallery Transplant» (1969), in which he cut the outline
of a gallery in the snow, [4] patterns cut in
wheat fields with combine harvesters, [6] and giant overlapping fingerprints representing the artist and his son Eric
sprawled across several acres
of a spoils
field in Lewiston, New York.