Geology Guided Walk with Phil St. George

Boyce Thompson Arboretum State Park

March 24 and April 28, 2018   1:30 p.m.

Learn about rocks and volcanic formations along our main trail on an informative tour with professional geologist Phil St. George. This lively tour compresses almost two billion years of geologic history into just over one educational hour! Learn about Pinal schist, the volcanic origins of Picket Post Mountain and the Apache Leap tuff.