This region of Britain is now a World Heritage Site , dubbed the Jurassic Coast ; in it layers of the Blue Lias are exposed , dating from the Hettangian - Sinemurian .
Head entity: hettangian Q633834 29
Tail entity: sinemurian Q911869 31
Relation (head \u2192 tail): P155
Inverse relation (tail \u2192 head): P156