I was lucky enough to receive some Micromatrix from @Gizmo and @sharkdoctor, and today I was looking through some of the teeth when I saw one I hadn’t noticed before. I’m sure I’ve seen something like it onlin but I can’t for the life of me remember where or what it is. Any one got any ideas?
Matrix is from VA, Old Church FM (oligocene) and Calvert FM (Miocene) contact layer. Measure is in centimeters