- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
The "Prussian Geological Survey" was formed in Berlin on January 1, 1873. Its basic principles have always been assembling accurate observations and recording them on geologic maps. It has always been closely linked with the development of economic geology, and for this reason figures prominently in the reconstruction of Germany's economic life.