I enjoy sorting through micro-matrix. Between the times that I'm able to spare a Saturday to drive 3 hours to the Peace River to sift for larger fossils, I like to have some micro-matrix on hand so I can easily scratch the itch when I feel the need to hunt for fossils--even if it is only from the comfort of my office desk. I'm currently working on a project involving micro-matrix (which I'll write-up on TFF once it is complete). This project requires a large number of specimens and so I've colle