It's not that i don't think people should do this (we shouldn't restrict ourselves to one field), but there are a lot of seminars. You have to be picky. I mean, give me a break - I went to the history of cosmology seminar, and didn't see you there.
And its unlikely you'll get something out of a very technical dissertation on a subject where you don't even have the basic knowledge to understand why the dissertation's relevant.
Magmatic intrusions have very little to do with palaeontology. They're kind of the opposite of paleontology. Really.