Georg HartungGeorg Hartung (around 1822 - around 1891) was a pioneering German geologist. He is best known for several books and articles about the islands of Macaronesia, especially the Azores and the Canary Islands.
The work of Hartung on the Azores contains illustrations of great scientific interest. Georg Hartung also met and corresponded with Charles Darwin and with Sir Charles Lyell, the pioneer of modern geology, from whom he received scientific samples. He visited the Canary Islands in the winter of 1853 and the spring of 1854. Provided by Wikipedia