I received a lease offer not far from you on 33-12N-15W in Custer county. Can anyone explain what this means? In one offer on a 3 year lease option they are offering a price on (all formations) on the second proposal 3 year option is surface of the earth to the top of the Mississippian formation. I only wanted a extended 2 year option but they want 3 years. I just don’t think I want to try these mineral rights up for 6 years. Any information would be greatly appreciated.