There are a multitude of specialized fields in geology. As a hydrogeologist, my interests have led me to the study of groundwater. This series includes images of rural groundwater well sites—one in the testing phase and one being pumped for the public water supply. Later in my career, as I became concerned about issues of energy and fossil fuels, I was drawn to create the image showing shale gas extraction. We plumb the earth for resources of many types and to many different ends.