My fiance's cousin got married a few years back, and I've always wished I could tell her how geologically appropriate their wedding venue was.

So I'm a geologist, but this happened a ways back when I was still in school. One of my classes had recently taken a trip to see an outcrop of igneous intrusions in the local hills. I got invited as a plus one to my fiance's cousin and her now-wife's wedding, and as he and I were driving to the venue, I said "oh hey I know this...