The salaries of geologists depend on their years of experience and in what sector they work. Geologists working for the oil industry make the most at an average of $83,000 a year as of 2007, according to the Geology website.
Another employment sector that pays geologists well, even with minimal experience, is the mineral resource sector. The average salary among different sectors for geologists is just over $59,000 a year as of September 2014, according to PayScale, Inc. On the lower end, they earn under $40,000 a year, while the top geologists can earn over $100,000 a year. Many geologists work in the government or environmental sector, where they earn closer to the average salary since they are working in a market that is not driven by demand.