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I was recently looking at the hashplates I collect a year ago near Green Bay, WI from the maquoketa formation. It is upper ordovician. As I was enjoying the look through my loop, I spotted a pinhead size dark rounded section under the blue ash layer...( that layer comes from the volcanoes in the Appalachian region). I use my 10x loop, and a pin and started scratching away the hardened material, discovering little by little a cute little trilobite. As I was moving around it, I found another cephalon, sort of "bumping into it" but I haven't worked on that one too much. But since it is a cephalon only (thus far) , I am wondering if someone can ID it for me. I have attached a view of the hash plate, an out of focus view of the trilobites with a measure, and an in focus view taken after I attached my loop with rubber bands to my cell phone. Thanks for the help.