California’s Proposition 65 entitles California consumers to special warnings for products that contain chemicals known to the state of California to cause cancer, birth defects or other reproductive harm if consumers are exposed to these chemicals above certain limits. Products linked to this page contain chemicals known to cause cancer, birth defects or reproductive harm.
The Munsell Soil Color Book is a standard tool used by geologists, civil engineers, and soil scientists and was developed with the U.S. Soil Conservation Service for classifying the color of the soil. Openings between the chips allow for easy visual comparison with soil samples.