I am trying to catch up on my fossil trip reports this Christmas break and what follows is a trip from Sept 2010. After a great deal of research, I made an attempt at finding a Spence Shale outcrop in SE Idaho in in 2009. Turns out I got within a 100 meters, but missed it. There are some dense woods around it. I had better luck last summer and had a chance to spend several hours at the site. The Spence Shale is part of the Langston formation and Middle Cambrian in age (513-499 mya). I belie