Take the case of a Boyertown, Pa., man whose home is located over a large subterranean rock formation called the Reading Prong, which produces radon gas.

The danger tends to be higher in uranium-rich regions like Pennsylvania's Reading Prong.

Consider radon, the radioactive gas that seeps into homes in places like Pennsylvania's Reading Prong.

In fact, it is the northernmost ridge of the Reading Prong in New Jersey.

From a survey of owners of single-family homes on or near the Reading Prong in northern New Jersey.

Only a small and fragmented province in Pennsylvania called the Reading Prong.

This belt, i.e. the Reading Prong, consists of ancient crystalline metamorphic rocks.

There are two subsections of the New England Uplands in addition to the Reading Prong.

The Highlands are part of the Reading Prong.

It is called the Reading Prong by geologists.