A mysterious rock/fossil that’s been in the family since my great great great uncle plowed it up when farming. Any ideas ?
Answer: This is almost certainly the remains of gypsum-filled mud cracks, a gypsum cast or mold. Gypsum-filled mud cracks are well known by geologists, and found in ancient evaporate lake depots, but it’s rare to see one weathered out like this specimen.
A mysterious rock/fossil that’s been in the family since my great great great uncle plowed it up when farming. Any ideas ?
