Related Clues:

• Animal remnant preserved in rock
• Preserved trace of an ancient plant or animal
• This fuel is natural, extracted from the ground
• Remains of an ancient plant or animal
• Ancient remains embedded in rock
• Ancient remain preserved in rock
• Remains of plant now hardened in rock
• Ancient remains as of plant hardened into rock
• Ancient remains preserved in rock
• The remains of a plant or animal that existed in a past geological age
• Remains or impression of a prehistoric plant or animal
• What one might become, by the look of Medusa
• It's a dead loss if it's 16 down
• Paleontology specimen
• At the back of the ship, the Italian gets an impression of what's passed