Geomathematics is an emerging new scientific area. Its increasing importance is due to visionary scientists such as Willi Freeden, whose 65th birthday is celebrated by this conference. This workshop is dedicated to the interdisciplinary research of mathematicians and geoscientists and contributes to the international year "Mathematics of Planet Earth 2013". It provides a platform for scientists working in the intersection of mathematics and the geosciences to present and discuss novel solutions and open problems. Besides the invited lectures, contributed talks, in particular also by junior scientists, from all areas of the interface of mathematics and the geosciences are welcome.