Image sent to me of a crinoid calyx fossil found in southern Indiana USA. It is from the Mississippian Period and appears to be a Phanocr...

Over the Thanksgiving holiday I received an image of a fossil imprint of some sort of coiled nautiloid. It was found on the Indiana side ...

If the label is correct, this is a rare mineral (for this locality) called langite found at the Cornwall Mine in Lebanon County, Pennsylva...