Blowouts
Blowouts are formed by the on-shore winds of Lake Michigan. The winds move sand and pile it into dunes. As the dunes form, plants begin to take hold, stabilizing the sand. Beach grasses form a large underground system of roots. This root system, creates stable areas of sand, from which the dune can grow. Slowly other plants take root in the protected areas, including bearberry (kinnikinnick) and small evergreens. Over time, larger plants like sumac, sand cherry, cottonwood, and juniper take hold and replace the grasses and smaller plants.
When a nick forms in this armor of roots and plants, the area can become a blowout. First, open sand becomes accessible to the wind. This can be by animal trails or by human footpaths. A tree could fall in a strong wind, exposing the underlying sand. When this happens, the wind once again goes to work on the loose sand. It undercuts the other roots, and begins moving sand southward. If the winds are strong enough or given enough time, a large blowout can occur, reducing the dunes to lake level over a large area. The 3 largest blowouts in the park are Beach House, Furnessville, and Big Blowout. Each extends into the interdunes, between the front rides of dunes and pockets, into the interdunal troughs. Big Blowout has uncovered an area of dead tree trunks known as the Tree Graveyard.
The park also has a Youth Tent Area separate from the public campground.
Read more about this topic: Indiana Dunes State Park