This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant mark

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced

The book describes the in intriguing geology and geologic evolution of Lassen Volcanic National Park and surrounding areas, providing an up-to-date source of ge