John W. (John Wesley) Judd

John Wesley Judd (1840–1916) was a British geologist and teacher whose work ranged from volcanic rocks to the structure of the Earth’s crust. He became well known in scientific circles in the late 19th century and played an important role in making geology a more modern, evidence-based field.

He taught at the Royal School of Mines and later served as Professor of Geology there, helping train a generation of students in close observation and field study. He also worked with the Geological Survey and built a strong reputation through research on volcanic regions, especially in places such as Italy and Scotland.

Beyond his own research, Judd was a prominent public scientific figure, serving in senior roles in major learned societies and contributing to the growth of geology as a discipline in Britain. He is remembered both for his scientific investigations and for the energy he brought to teaching and communicating earth science.