Duinzand

Duinzand is wind-transported sand that forms dune systems in coastal, desert, and inland environments. The material is typically quartz-rich, with minor amounts of feldspar or lithic grains, and is usually well sorted and rounded due to repeated abrasion by the wind. Grain size is generally in the fine to medium sand range, reflecting its aeolian origin.

Dune sand forms when a source of loose sand is available and wind conditions favor transport and deposition. Saltation and surface creep move grains along the surface, while vegetation, moisture, or topography create zones of accumulation. Over time, dune shapes develop in response to prevailing wind directions; common forms include transverse, longitudinal, and parabolic dunes, as well as foredune and embryo dune complexes near coasts. Dune sand can remain active, migrating under shifting winds, or become stabilized by plant communities and soil formation processes.

Geographically, dune sands occur worldwide, with prominent examples along coastlines and in inland dune fields. They often contribute to protective barriers against storms and salt spray, while also hosting specialized ecosystems adapted to dry, sandy conditions. The color of dune sand ranges from pale yellow to light brown and is influenced by mineralogy and organic content. Its porosity and permeability are typically high, affecting moisture dynamics and habitat conditions within dune systems.

Management of dune sand emphasizes coastal and ecological protection. Actions such as planting vegetation, installing sand fences, and controlled disturbance help stabilize dunes, preserve habitats, and maintain their role in coastal defense. In some regions, dune sand is used in restoration projects or landscaping, though practices vary according to environmental and economic considerations.