Using a simple technology called a core sample, second graders discovered that this simple device can tell you so much. The clear tube is inserted into soil. Pushing down hard, the layers of soil collect in the tube. When the tube is removed from the soil, the tube's transparency reveals the layers in the soil. The photo to the right shows what eight different spots look like at one site. Can you tell which layers are topsoil, sand, clay and bedrock?
As we discover more about soil and its layers, we'll be able to make more informed decisions regarding where to build the TarPul, just like a real geotechnical engineer would do! How awesome!