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petrologist:
(plural: ‘petrologists‘; pronunciation: the letter ‘g’ is said with a ‘j’ sound as in “judge”)
a petrologist collecting samples
a person/scientist who studies the kinds, origin, composition, structure, etc. of rocks,
(‘petrology’ = the study of rocks, and is an important/essential part of geology)
e.g.
A petrologist works in mining industry — searching for gold and petroleum, and extracting them from the rocks.
Petrologists spend half of their working time in collecting the rock samples from the fields and the other half in studying and analyzing them in the laboratories.
a petrologist at work
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