coal mines in free state

Mining in Kansas Historical Society

Mining in Kansas Much of the state s economic growth has been based on abundant mineral deposits During the late 19th and early 20th centuries coal oil and natural gas lead and zinc salt and many other natural resources were extracted from the earth

Coal The New York Times

· Commentary and archival information about coal from The New York Times The impact is being felt at a Pennsylvania mine about to

Coal in Pennsylvania

coal mining operations has caused extensive pollution of streams and loss state all land was low and flat and had rivers flowing westward to drain into