LJK, Thanks for the advice, you are right, it does sound like I could just be throwing out vocab. How about this? It is what I used for my NSF app and I had thought that something different would work better for my grad apps, but after what you said, I think it would work pretty well:
In front of me on a long table sits a half-ton block of rust red siltstone, encased in plaster and burlap and containing hundreds of small, hematite encrusted bones of a basal armored dinosaur. Each bone, after I carefully abrade away the hematite, tells an interesting story. I spent the last year poring over these bones, discovering the innumerable clues that tell me about what this animal looked like, how it lived, and how armored dinosaurs evolved.
And then I could say something briefly about how the project and my classes have led me to choose my specializations before moving on to the more detailed part of the essay.