James D. Dana Small 268×320 Medium 535×640 Large 856×1024 Download Tiff Original 2007×2400 | (2.8 MB) Description James Dwight Dana (1813 –1895) was an American geologist, mineralogist and zoologist. He made important studies of mountain building, volcanic activity, and the origin and structure of continents and oceans. Keywords geologist, James D. Dana Galleries Famous People: D, Geologists Source: Winchell, Alexander Sketches of Creation (New York, NY: Harper & Brothers, 1870)