Iron Rock

The Orc stronghold in the north of the Badlands is known as Iron Rock. It is a mountain formed of molten iron, vomited from the bowels of the earth during some ancient upheaval. The Dwarfs first discovered the mountain's rich seams and created a labyrinth of partially finished mineworks, but before they could extract the valuable resources held within, the Orcs arrived. Despite the Dwarfs' continued claim to the mountain, for over 800 years it has remained firmly in greenskin hands. The legendary Warboss, Gorbad Ironclaw, forever secured Iron Rock's dominance of the northern tribes by defeated Crusher Zorgoth and so uniting both Ironclaws and Broken Tooth tribes into a powerful tribal union that has subjugated the area ever since.

Source
Blood in the Badlands (supplement)

pg. 9