 For instance there are chevrons in Hither Hills State Park on Long Island and in Madagascar (such as the Fenambosy Chevron), as well as in interior sites of the United States such as the Palouse region of eastern Washington State, the Great Sand Dunes National Park and Preserve, and White Sands National Park.According to Hansen et al.2015, powerful storms and changes in sea level rise can explain chevrons, as the study elaborates