Petrologist:
Petrology (from the Greek πέτρος, pétros, “rock” and λόγος, lógos, “subject matter”, see -logy) is the branch of geology that studies rocks and the conditions under which they form. Petrology has three subdivisions, igneous, metamorphic, and sedimentary petrology. Igneous and metamorphic petrology are commonly taught together because they both contain heavy use of chemistry, chemical methods, and phase diagrams. Sedimentary petrology is, on the other hand, commonly taught together with stratigraphy because it deals with the processes that form sedimentary rock. [Wikipedia]
Noted in “Why Thousands of Volcanologists are Meeting in Portland,” Erik Klemetti, Rocky Planet:
So, this whole week I’ll be taking part in the IAVCEI meeting in Portland, Oregon. Of course, most people have never heard of IAVCEI, which is an abbreviation of the International Association of Volcanology and the Chemistry of the Earth’s Interior (now you can see why we use the abbreviation.) This meeting is bringing together over 1,200 volcanologists and petrologists (who study magma, not petroleum) from all over world to talk about volcanoes.
