According to a summary report on The Warm Springs of Georgia, published in 1937 by the USGS, Blue Spring is located on the north slope of a ridge on the south side of Pine Mountain.
The spring is formed in a recess in this quartzite ridge. The Pine Mountain Hollis Quartzite bedrock is conducive to the formation of many springs in the area, including the famous Warm Springs 20 miles to the northeast. The year-round constant temperature of 64 degrees at Blue Spring suggests that the surface rainwater has permeated the fractured quartzite, thereby filtering out naturally all but a very few minerals. This naturally pure water flows out of the crystal clear spring often appearing blue in the sunlight due to light refraction. Hence it’s name, Blue Spring.