Steven Poulton, Chief Executive of Altus, commented: "The drilling programme and seismic surveys at the Lakanfla project in western Mali have successfully proven the existence of a karst style system.

It covers a quarter of the United States, and almost as much of the entire world. It results in the creation of most caves visited each year by millions of tourists around the globe, including the ...

East Whiteland >> The recurring development of sinkholes near or beneath roadways in the East Whiteland Township area is all the more reason why the region is the wrong place for pipelines, state Sen.