There is no known sand mountain in Georgia. Georgia does have sandhills, which are a distinct landform, but they are not called "sand mountains."

Formation of Sandhills in Georgia:

The sandhills in Georgia were formed during the Pleistocene epoch, around 2.6 million to 11,700 years ago. The process is as follows:

1. Glacial Activity: As glaciers advanced and retreated in the northern hemisphere, they eroded vast quantities of rock and sediment, which were transported south by strong winds.

2. Wind Deposition: These winds carried the sediment south, depositing it in large dunes.

3. Stabilization: Over time, vegetation grew on the dunes, stabilizing them and creating the sandhills we see today.

These sandhills are a unique and valuable ecosystem, supporting a variety of plants and animals that have adapted to the sandy, nutrient-poor soil.

If you are thinking of a specific mountain in Georgia, please provide more information about its location or any other details.