Mt. Baldy From the Shore
The 125 foot tall Mt. Baldy sand dune in Michigan City, Indiana is washed with early morning sunlight on a crisp, October morning. This is a living sand dune, meaning it is constantly changing and moving inland - driven by wind and erosion. It is slowly taking over the woods on the back side of the dune, at the rate of about four feet a year.
The blowout is evident on the left side of this image. Marram Grass and some trees are able to hold the sand in place on the high portion of the pictured dune, but this grass is unable to take hold on the rest of the dune. Since nothing can hold the sand in place, it blows over the top and eventually falls down the dune and covers whatever is in it's path.