"Here, the steep, sunlit side of the dune, called a slip face
, indicates the down-wind side of the dune and direction of its migration.
Police say Funk was speeding and lost control on a slip face
dune and then left his passenger behind.
The work will involve securing the existing slip face
, followed by the building of a large concrete retaining wall, behind which the road will be rebuilt.
The steep dip angles indicate that this surface was a former slip face and gives the first evidence of the development of dunes with significant topographical relief.
In the southern segment of the study section (Figure 3C) the Inceptisol is exposed at between 10 to 15 meters above current lake level and dips 22[degrees] to 25[degrees] to the east, This suggests that these outcrops represent a portion of the back (landward) slip face of the former dune.
Witnesses saw Dickson summit a 100-foot-tall sand hill known as "Slip Face
." As he descended a 25-foot drop-off, his 2005 Yamaha Grizzly flipped and rolled over onto him.
While traversing this expanse of dunes, I notice that there are more hues and calming shapes which expose all sand dunes, with windward sides and slip faces
in a medley of natural, untouched beauty.