Thanks to all and all good advice. It's a rubber (blue) with two raised beads all the way around even at the back where it rounds into the engine below the main seal which is where it slipped (moved) out and a leak appeared. Will also replace the main seal when doing the pan. Thanks again guys I knew by going to "fabricators" I would find some good answers.
ps....I guess you can tell I am not a mechanic just trying to help my youngest son with a Jeep I bought for him as a surprise when he comes for Christmas.