| Age | Formed millions of years ago | Formed relatively recently (geologically) |
| Appearance | Low, rounded, and eroded peaks | High, steep, and rugged peaks |
| Erosion Impact | Highly eroded due to time and weathering | Less eroded, still rising |
| Examples | Aravalli Hills (India), Urals (Russia), Appalachians (USA) | Himalayas (Asia), Alps (Europe), Andes (S. America) |
| Location | Found in stable continental interiors | Found at active plate boundaries |
| Tectonic Activity | Generally inactive | Tectonically active |