In Wednesday's geology lab, we participated in a minerals/rock-identification exercise that was really a review of the previous geology course I took last fall. It was great fun, and a good reminder of why I'm so interested in geology.
So at the end of the lab, my lab partner and I were attempting to identify "unknown rock C," along with about 7 other students. Clustered around the table at the front of the room, we debated what minerals were present in the rock, whether it was more mafic or felsic, intrusive or extrusive, and attempted to locate the rock on a chart that would help us identify it.
"Andesite," I said. "I think it's andesite."
My colleagues gathered around differed, each offering a different hypothesis as to the identity of the unknown. Eventually the TA -- noticing our debate -- came over to walk us through the identification process. After this, she finally pronounced that the rock was . . . andesite.
One of the students (a member of the university marching band, I believe; probably all of 19 or 20 years old) said to me, "Next week, will you be my lab partner?"
YEAH! Score one for the old lady of the class!