The fault shapes the municipality's relief, with strong urbanized areas above the cliffs created by the fault, such as Les Trixhes, and also below, with the center of Flémalle. This fault was long exploited by various quarries. Those located behind the village of Chokier gave birth to the "Aux Roches" nature reserve. The municipality's altitude ranges from a minimum of 62 m (along the Meuse) to a maximum of 238 m (in the extreme south of the municipality).. Although the south is higher than the north, it is in the north that the fault is most noticeable, notably with the Chokier Castle, which is perched on a promontory. Along the Meuse, the terrain is flat, while to the north, the terrain is hilly, particularly in Awirs with the stream; the south experiences a constant elevation rise.
The fault shapes the municipality's relief, with strong urbanized areas above the cliffs created by the fault, such as Les Trixhes, and also below with the center of Flémalle. This fault was long exploited by various quarries. Those located behind the village of Chokier gave birth to the "Aux Roches" nature reserve. The municipality's altitude ranges from a minimum of 62 m (along the Meuse) to a maximum of 238 m (in the extreme south of the municipality).. Although the south is higher than the north, it is in the north that the fault is most noticeable, notably with the Chokier Castle, which is perched on a promontory. Along the Meuse, the terrain is flat, while to the north, the terrain is hilly, particularly in Awirs with the stream; the south experiences a constant elevation rise.