5. Some Economic Uses http://www.vermontstone.com Slate as a building material www.cactuspro.com/images/substrat_vermiculite.jpg Vermiculite as a soil conditioner* *and for insulation www.gerdenhealth.com A variety of clay minerals are used for ceramics http://www.joepicassos.com/potters_wheel.html
6. Some Economic Uses - Local The (now defunct) Grand Ledge Clay Products Company from Dorr and Eschman, Geology of Michigan, 1970 Pennsylvanian age shale was historically quarried in mid- Michigan for use in the local ceramics industry.
7. Environmental Hazards – Swelling Clay http://www.jansenkiener.com/Forensic%20Photos.htm From Nelson and Miller 1982 Foundation damage High risk areas * Hazards arise from the natural ability of some clays to absorb large amounts of water
8. Environmental Hazards – Mass Movement www.cnn.com www.landslides.usgs.gov http://www.swgfl.org.uk/jurassic/coastal/bowlease.jpg * Although other factors such as heavy rainfall are also important, a high clay content in soil can elevate the risk of landslides in steep terrain.