I believe much of the sand in the Canaries (other than that shipped in to the more elevated isles to make white-sand beaches) is blown across - the native sand

I believe much of the sand in the Canaries (other than that shipped in to the more elevated isles to make white-sand beaches) is blown across - the native sand is black, volcanic. Fuertaventura is low-lying to the East and it has wonderful beaches. I believe I also read the Amazon relies on Sahara sand for minerals; "dust picked up from the Bodélé Depression in Chad [located at the southern edge of the Sahara Desert], an ancient lake bed where rock minerals composed of dead microorganisms are loaded with phosphorus. Phosphorus is an essential nutrient for plant proteins and growth, which the Amazon rain forest depends on in order to flourish." -- https://www.nasa.gov/centers-and-facilities/goddard/nasa-satellite-reveals-how-much-saharan-dust-feeds-amazons-plants/ https://www.nasa.gov/centers-and-facilities/goddard/nasa-sat... I wonder if this means the present state of the rainforest is non sustainable?