A stunning example of a multi-ammonite fossil of the species Promicroceras planicosta from the world-famous Jurassic Coast beach of Lyme Regis, Dorset UK.
The pieces of limestone matrix measure 112 mm (4.43 inches) across and contain four ammonites (two shells and two impressions in each piece) and two unusual bivalve shellfish. The fossils are well preserved and have been prepared out of the rock to reveal the shells. This is a classic "popped" fossil where the rock split open to reveal both the positive casts of the shells and the negative impressions. The two pieces fit back together as they once were before being split. The ribs of the ammonites are very finely defined, and the colours are beautiful: a mix of yellows, creams, greys, and browns. The fossil weighs 575 grams and has a cut flat base to allow it to stand freely on its own for display. This one can be displayed split open or back in one piece with a surprise inside!
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.