"Marcia Bjornerud's life as a geologist has coincided with an extraordinary period of discovery. From an insular girlhood in rural Wisconsin, she found her way to an unlikely career studying mountains in remote parts of the world. As one of few women in her field, she witnessed the shift in our understanding of the Earth, from solid object to an entity in a constant state of transformation. In the most tumultuous times of her own life, a deep understanding of our rocky planet imbued her life with meaning"--