The chemistry of the earth's crust WordNet 3.0 & Open English WordNet

Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. Wikipedia

Science that applies chemistry to geological systems Wikidata

Science that involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks and soils, and the cycles of matter and energy that transport the Earth's chemical components in time and space, and their interaction with the hydrosphere and the atmosphere. OmegaWiki

A scientist specialized in geochemistry. OmegaWiki

The branch of chemistry that deals with the chemical composition of the Earth and other planets, and with the chemical processes that occur in the formation of rocks and minerals etc. Wiktionary

Branch of chemistry. Wiktionary (translation)