How much does an Assoc. Professor - Geological Sciences make in North Dakota? The average Assoc. Professor - Geological Sciences salary in North Dakota is $75,406 as of November 25, 2019, but the range typically falls between $62,876 and $100,761. Salary ranges can vary widely depending on the city and many other important factors, including education, certifications, additional skills, the number of years you have spent in your profession.