In the previous post, I wrote about a visit to Sant Ignazio Roman Catholic Cathedral in Rome, Italy. I found some ammonite fossils in the floor slabs. The last post was about the red fossils, this one is about the yellow ones. I believe this yellow stone is referred to as Ammonitico Giallo. Fossils from this layer are from the Jurassic Period.
On the Internet is a waymarking web site that documented this find. They are similar to the ones I found at St. Peter's Basilica in Rome.
