Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
A The Ohio Shale is a geologic formation consisting of a black, organic- and clay-rich rock. In central and western Ohio, it commonly contains between 10 and 40 parts per million of uranium, and this is 5 to 20 times more uranium than the average rock in the Earth’s crust contains. Radon is a by-product of the radioactive decay of uranium.
