There's a huge range of roles that a geologist could be involved in, which come with all kinds of pay, work hours and conditions.
Starting off in geology can lead into geophysics, geochemistry, hydrology and various types of geological engineering.
To get an idea, here's the "Earthworks" site which is dedicated to "earth science" roles :http://www.earthworks-jobs.com/
Ultimately its a question of the balance you prefer between field work, lab work and office/computer work, as well as how far into the maths side you want to go.
There's a great report from Georgetown on what major gets you where :https://georgetown.app.box.com/s/5bgczqc0nefsx68bj4u4
Note that geology is in the bottom ten in terms of popularity, but the top ten in terms of employment after graduation. The specific info on geology starts on page 158.