Gypsum Sand in New Mexico

Gypsum Sand in New Mexico, The “sand” in these miles of shifting dunes is not composed of silica, like most inland sand. Interestingly, the sand at White Sands is almost pure gypsum. Gypsum is different from many other rocks because it is readily soluble.

That means it will dissolve in water, just like sugar or salt. When rain falls on the mountains, the layers of gypsum start to dissolve, and the gypsum runs down the mountains as fast as the water can carry it.

Since the Tularosa Basin and the dunes are fully enclosed, there is no outlet to water of any kind, so the gypsum stays in the monument.

Gypsum is actually a clear substance; the dunes appear white like snow because the gypsum grains are constantly banging into each other. The scratches then reflect the sun’s rays making them appear white.

Also, unlike silica sand, gypsum doesn’t absorb heat from the sun. So even on the hottest day of the year, the dunes are cool and comfortable to walk on, making White Sands a nice stop in the summer. Just visit when the sunrays are not at their peak, and remember to bring plenty of water to drink.

The gypsum dunes are home to a unique ecosystem of plants and wildlife, many of which only exist here in the northern end of the Chihuahuan Desert.

Have a wonderful weekend.

Gypsum Sand in New Mexico

Sandra J