On this piece from Holderness are two Arnioceras semicostatum as Microconch and on macroconch of Arnioceras semicostatum. The largest Ammonite fossil on this piece measures about 53 mm in diameter. | |||
Location: | Aldbrough, Holderness Coast, Yorkshire, UK | ||
Size Matrix : | about 98 x 60 mm | ||
Age: | Jurassic, lower Lias, Semicostatum Zone (About 190 Ma) |