Pennsylvania glaciation, first phase materials for a discussion of the attenuated border of the moraine described in volume Z of the second Geological survey of Pennsylvania This book, "Pennsylvania glaciation, first phase materials for a discussion of the attenuated border of the moraine described in volume Z of the second Geological survey of Pennsylvania", by Edward Higginson Williams, is a replication of a book originally published before 1917. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.