Sounds like you did your degree at Swansea.
But by way of suggesting another approach to your situation…
There is nothing wrong with your first degree combination. I mean, you can see it as ‘fluffy’, or you can cast yourself as someone with a serious interest (at some point, expertise even!) in American-based geographical questions. On that basis, the work you could do is significant if not exactly limitless.
If you have shifted focus to geology, was your geographical interest always more on the natural side of things?
I am just thinking that you might keep your eye on various environmental services and/or charities. I am sure there will be something out there that corresponds to your interests without you having to spend an additional £19k.
Just a thought…