The Gorgon Field — Kate Wilhelm

What is Ramón's hold on Carl Wyandot, one of the richest men in the country? Carl's daughter hires Constance and Charlie to find out why her father intends to give a hidden valley in Colorado to him. In the valley there is the mammoth formation called the Gorgon Field, red sandstone pillars that are unscalable, cover an area a mile and a half from front to back, and reach nearly two hundred feet in height. Why is Constance entranced by them? Why are others so afraid of them?