Chemical or Geological Engineering?

Ultimately you have to do some pretty serious "homework" to find details and information on the fields. However, I can give some advice and suggestions. 1st, and perhaps of most importance, the broader the discipline, the more versatile it is, and the more versatile employers are going to see you. So, since chemical engineering is one of the main, basic disciplines (the others are electrical, civil and mechanical), the options, job opportunities, and number of schools to get the degree are much greater than for geological, which is more of a sub-discipline or specialty. Chemical engineers have a lot of opportunities for out-door work. Many chemical engineers work as petroleum engineers, environmental engineers, and in out-door plants, like refineries, gas purification plants, and innumerable others. As for job outlook, none of us have a real crystal ball. The official US government projections for both are downward, but there is no real reason for that - except that for 40 years or more, those making the projections tend to academics and government workers, and they just see "traditional" jobs flat to dropping, but those same people didn't see the nanotechnology, electronics, pharmaceutical, medical device, environmental controls, bio-fuels, and other industries growing and needing chemical engineers - they could only see refining, petrochemicals, agrichemical, and other "old" industries. So, if the past is any predictor of the future, there will be industries demanding chemical engineers that we don't think of or that don't yet exist, and therefore growing demand.