How did the Carcross Desert in Yukon form?

The Carcross Desert in Yukon is not a true desert, but rather a series of sand dunes that form the remnants of ancient lakebeds. These dunes are composed of fine sand and silt deposited by glacial meltwater thousands of years ago. As the glaciers receded, the meltwater carved out valleys, and as the water levels dropped, the exposed lakebeds dried and were shaped by the wind into the dunes seen today. The area receives minimal precipitation, contributing to its desert-like appearance, but it is a unique geological formation rather than a naturally occurring desert.1