A neighbor's foundation construction opened up the ground in a way that allows one to see the soil layers, or soil horizons. The top soil is the A horizon. It is mostly made up of organics from decomposition (plant matter). The next layer that is brown in color is a the B horizon it is a mixture of the soil and the plant matter due to leaching and mixing processes involving animals/plants. The C horizon is the lightest material. Its nature comes from the "parent material" or rock in the area. Then in the bottom of the picture, you can see the white limestone that gives rise to the layers mentioned above. The rock is about 6 feet below the surface in this area. Depth to bedrock can vary widely, so it is good to know for any gardening work. I think it also conveyes that the good topsoil is a limited resource that we need to protect and use wisely.
