This book, "Polevaya Geologiya Tom 2," by V.A. Obruchev, is a replication of a book originally published before 1932. 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.
Vladimir Afanasyevich Obruchev (Russian: Владимир Афанасьевич Обручев) was a Russian and Soviet geologist who specialized in the study of Siberia and Central Asia. He was also one of the first Russian science fiction authors.