Let's talk about two types of dunes: foredunes and blowouts
Foredunes are shore-parallel dune ridges that are just landward of the beach and covered in vegetation like marram grass that helps trap blowing sand. A blowout is a saucer-, cup- or trough-shaped depression or hollow formed by wind erosion on a preexisting sand deposit. Blowouts form as a result of some disturbance, when vegetation is absent or damaged so that it cannot anchor sands in place. Wind blows the loose sand, making a “living dune,” that can move several feet every year.
Save the Dunes is a 501(c)3 non-profit environmental advocacy organization in Northwest Indiana with roots in establishing Indiana’s only National Park. We work to protect the Indiana Dunes and Lake Michigan through meaningful conservation, advocacy, and community engagement that increases the overall health and vitality of our region.