   thumb|295px|right|the hilly and forested regions of the ardennes the ardennes (; ; also known as ardennes forest) is a region of extensive forests, rough terrain, rolling hills and ridges formed by the geophysical features of the ardennes mountain range and the moselle and meuse river basins. geologically, the range is a western extension of the eifel and both were raised during the givetian stage,the defining stratotype for the geological period is an outcropping in givet in the ardennes. of the devonian (419.2 Â± 3.2 to about 358 mya (million years ago)gerrard, p. 16.) as were several other named ranges of the same greater range. primarily in belgium and luxembourg, but stretching into germany and france (lending its name to the ardennes department and the champagne-ardenne rÃ©gion), and geologically into the eifel&mdash;the eastern extension of the ardennes forest into bitburg-prÃ¼m, germany, most of the ardenne proper consists of southeastern wallonia, the southern and more rural part of the kingdom of belgium (away from the coastal plain but encompassing over half the kingdom&#146;s total area). the southern part of the ardennes is the northern section of the grand duchy of luxembourg and on the southeast the eifel region continues into rhineland-palatinate (german state). the trees and rivers of the ardenne provided the underlying charcoal industry assets that enabled the great industrial period of wallonia in the 18th, 19th centuries, when it was arguably the second great industrial region of the world, after england. the greater region maintained an industrial eminence into the 20th century after coal replaced charcoal 
Ardennes Forests_of_Belgium Forests_of_France Forests_of_Luxembourg Geographical,_historical_and_cultural_areas_of_Belgium Geography_of_Belgium Geography_of_France Geography_of_Luxembourg History_of_Wallonia Old_growth_forests Rhenish_Massif Wallonia