Geschichte: 'Tucking Mill', just outside of Bath (Somerset), is actually a historical place: it's the house in which William Smith, one of the first geologists, lived during the 1790's. He began collecting fossils when the Somerset Coal Canal was dug through the landscape. That's exactly what I did too and I found a lot of well preserved marine fossils just in front of his former house.
Geologie: The sediments of the southern outskirts of Bath formed during the Cretaceous period, meaning between about 70 and 150 million years ago. During that time, England was covered by a shallow sea experiencing a tropical climate. That is why a big variety of marine fossils can be found in the rocks from that time. This piece is a limestone containing some shells and one ammonite (left side) fossil.