Mountain Press Publishing Missoula Montana
Darwin Spearing
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

   Roadside Geology of Wyoming
   Roadside Geology of Louisiana
   Roadside Geology of Texas