Naturally occurring radioactive rock is brought up by oil and gas drilling, and is an increasing problem in boomtowns
This is a great report from Al Jazeera on oil drilling and fracking in North Dakota. Of note: "Health officials have said that radioactive filter socks — tubular nets that strain liquids during the oil production process — and other waste are increasingly being found along roadsides, in abandoned buildings or in commercial trash bins, sometimes those of competing oil companies"











