Add Yahoo as a preferred source to see more of our stories on Google. One of the best places to visualize the geological features known as the Balcones Escarpment and Balcones Fault is Mount Bonnell.

Readers ask: "Where exactly is the Balcones Fault?" And while we're at it, "What precisely is the Balcones Escarpment?" Excellent questions. Even some old-timers can't tell you exactly where these two ...