Location: North Yorkshire Coast (found on beach)

Class: Ammonitida

Sub Class: Hildoceras

Age: Early Jurassic

Shape: Coiled

Mode: Nektonic, free swimming buoyancy achieved using air chambers

Fossil shown is actually 6 inch wide, and found as a boulder on the beach.

This is the first half of a mud stone nodule, broken in half by using a Geological hammer. Taping nodule with the hammer makes a sound just like pinging a piece of pottery, a weak point can be identified by a dull sound whereas a perfect piece gives a nice ring. Please note when using a hammer safety glasses must b e worn.

One type of fossil is a trace fossil which this is, if you look carefully it is only the imprint of a fossil not the fossil itself.