John Shelton was an Associate Professor o Geology at Pomona College – he also had his own plane and what better way to look at some geology in action. A good portion of the many photos were taken by John from the air. One of my favorites is the cover photo – I still have the placements he made me with that photo. His sister-in-law Barbara worked with Kristalle for many years. – Dona

By presenting and interpreting an unequaled sequence of nearly 400 photographs, the author of this handsome volume develops, step by step, the main principles of physical and historical geology.