This is a very rich ammonite concretion with Arnioceras semicostatum from the Yorkshire Coast. The largest ammonite has a diameter of about 50 mm, the smallest measures about 17 mm. The piece offers a very pleasing distribution pattern of the ammonites. | |||
Location: | Whitby, Yorkshire, UK | ||
Size Ammonites: | about 24, 18 , 10 mm | ||
Age: | Jurassic, lower Lias, Semicostatum Zone (About 190 Ma) |