Thoughts on Thumb Butte: A Geological Journey with Beth Boyd

Rising prominently on the skyline, Thumb Butte has long sparked curiosity and wonder, but how much do we truly understand about this striking volcanic formation? Join retired professor and geologist Beth Boyd for a fascinating look at Thumb Butte, one of Prescott’s most iconic natural landmarks. In this engaging presentation, Dr. Boyd explores what we know—and don’t know—about the geology and mysteries of this striking outcrop. She’ll review key theories, challenge common assumptions, and reveal the most likely explanation based on current evidence.

Don't miss this chance to deepen your appreciation for Prescott’s diverse landscape and to hear the story the rocks have been waiting to tell.

Doors open at 6:30pm. The presentation starts at 7:00pm.

*The event is free, but space is limited, and registration is required. For those unable to attend in person, the talk will be live-streamed on our YouTube Channel.

Beth Nichols Boyd is a retired professor and department chair at Yavapai College in Prescott, Arizona. She started teaching there when the world was young, leading more than 600 field trips over her lengthy career to most of the geologic wonders of the Southwest, eventually specializing in sharing her knowledge of the geology of the Prescott area with her many students. She holds a B.A. in geology and chemistry from Oberlin College, an M.S. in geoscience from the University of Arizona, and a doctorate in science education from Capella University. Her new book, Exploring Prescott’s Unique Geology, reflects decades of fieldwork and a deep passion for sharing the story of the local landscape. Beth has also taught internationally in New Zealand and Canada, further broadening her geologic perspective, but Prescott has always been home.