Before revision: Devil's Tower, Wyoming, a prominent basalt (traprock) landscape feature Traprock (or basalt) mountains, ridges, (or just traps) are elevated landscape features made of the rockknown as basaltand its close relatives .
After revision: Devil's Tower, Wyoming, a prominent basalt (traprock) landscape feature Traprock (or basalt) mountains, ridges, (or just traps) are elevated landscape features made of trap rock, most often basalt .