The Underground Spring - #2977
I first noticed it one day when I was mowing the lawn - a little dent in the ground. Over a few weeks, that little dent became a growing sinkhole. The ground was literally collapsing. I asked a neighbor, who was an amateur "sinkholeologist," what caused this phenomenon. He told me it was the drought of rainfall that we had been having. He said an underground spring had probably dried up. And that dried up the ground, and the roots above it - and my yard fell in.