My hubby and I were hunting for fossils along Choctaw Creek in Grayson Co. Tx. when we came upon several ammonoid's and gastropod's in a small and thin section of sandstone within gray shale/mudstone. I am still very wet behind the ears on formations, but I think that this is part of the Woodbine group; although I could be wrong.
To our horror, they started falling apart when we would expose the fossils. They have this white and yellowish chalky substance all over them that I think is pyrite disease.
I washed off as much of the chalky substance as possible on a couple of pieces, along with what was some amazing detail; but I have let the rest of them alone for now until I knew what would be the best approach to the situation.
Is there any way to save these little beauties, or are they doomed?