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 a 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.