Asteroceras obtusum ( Sowerby)
Free standing grey limestone with a beautiful 3D calcitic Asteroceras at the top. Developed right to the centre. Fine example of this zonal index fossil.
Jurassic, Upper Sinemurian, Obtusum Zone.
Black Ven, Charmouth / Lyme Regis, Dorset.
Ammonite : 5.2 cm diam.
