Darwin Spearing will tell you about the rocks as you come to them--describing what they are, when they formed, what they mean, and how they fit into the big picture of the geology of Texas.
Darwin Spearing, author of Roadside Geology of Texas and coauthor of Roadside Geology of Wyoming, whetted his interest in the geology of Louisiana as a research geologist and exploration manager for Marathon Oil Company. Since then, he has served as a museum designer and a national park ranger. Spearing writes from his home in Grand Lake, Colorado
