Across Medano Creek to the east of the main dunefield, scientists have
been tracking the movement of what is commonly known as the "Escape
Dune." This dune forms from sand which is not recycled
by Medano Creek. The animated line above represents measurements of the
dune crests since 1992.
Notice that from 1992 through 1995 a barchan
dune moved through the landscape. In 1996, scientists also began mapping
a parabolic dune located north of the barchan
dune. And in 2002, the barchan and parabolic dunes joined to form one
parabolic dune system.