Complex sentence: The High Knob Massif contains one of the greatest concentrations of mountain gorges in Virginia, with many being associated with a complex duplex imbricate system that topographically possessess an atypically long back-slope, the longest back-slope on any mountain in western Virginia.
Split into simpler sentences: The High Knob Massif contains one of the greatest concentrations of mountain gorges in Virginia, with many being associated with a complex duplex imbricate system that topographically possessess an atypically long back-slope. The longest back-slope on any mountain in western Virginia.