The Geological who maps the location of volcanoes and studies global patterns is what

The Geological who maps the location of volcanoes and studies global patterns is called as primarily geology

Explanation:

The geologist who maps the location of volcanoes and studies global patterns is the one studying earth science (primarily geology) which describes the physical contribution of the earth, processes related to the earth and it's atmosphere.

Earth science has 4 branches but geology is the prime branch of earth science. Geology in earth science deals with-natural hazards, works to protect earth's environment and also deals with earth's material and processes.