Search the Community
Showing results for tags 'upper mississippian'.
Found 3 results
I stopped by a prospective road cut today. Upper Mississippian (Salem Limestone). I didn't stay long so there is no trip report. Sorry... I promise a full report the next time I am there. I walked it for a few minutes and picked up a hand full of things. I mainly wanted to see if anything could be found and if it warranted spending more time there. I did split a couple of rocks to take a peek. To my amazement, on one of the splits, I found my first recognizable trilobite piece from out in the field! I have found a handful of trilo-bits in gravel drives, parking lots and the like, but never one when I was actually out hunting, so I am super excited! It's a little pygidium and I almost missed it. It is about 10mm long by 14mm wide. I don't know the area very well yet, but I have read that Griffithides bufo can be found in the Salem Limestone formation. I know it may be a long shot, but can any ID be made from this pygidium? The split wasn't the greatest, but I was able to save the positive and negative pieces.
I stopped by a new road cut today to see if it would be a viable hunting spot. One of the things I found there was this interesting piece. Maybe an Ichnofossil? Some type of burrow or feeding trails? According to the USGS map, the cut is Salem Limestone which is Upper Mississippian in age. Any ideas? This small piece that I picked up came from a larger slab that was over a meter wide. The whole rock was covered in these and they are in between the layers. The big ones are only about 1cm across and most are half that. A photo from the field... This is a picture of it wet...
Today I was in Southern Illinois and made a Quick stop at a road cut near Anna, Illinois, just off of Interstate 57. This exposure is: Upper Mississippian Middle Chesterian Series Golconda Formation Harvey Member I found a few nice hash plates and some blastoids, Archimedes’ screw, brachiopods, Horn coral, Bryozoan, crinoid stems and one trilobite pygidium.