These strange ice formations were found along the banks of Reedy Creek after the single digit weather. An explanation that fits the situation was found at www.mnn.com/earth-matters/climate-weather/stories/7-strange-ice-formations….
When the temperature of the soil is above freezing, and the temperature of the air is below freezing, water flowing below the soil’s surface is drawn up through capillary action, and it freezes on contact with the air. More water is drawn up and freezes, and ice is formed in a needle-like column. While the process is simple enough, the resulting delicate “hair” growing up from the ground is something rather amazing to look at.
Take your time, be observant, and you can always find something interested at Reedy Creek and Crooked Branch Ravine Park.