SAND SCULPTURE Sandstone arches such as the 22-meter-long Double O Arch in Utah’s Arches National Park form without chemical glue. Instead, downward forces cause sand grains to interlock.
Michael Atman
SAND SCULPTURE Sandstone arches such as the 22-meter-long Double O Arch in Utah’s Arches National Park form without chemical glue. Instead, downward forces cause sand grains to interlock.
Michael Atman