Earth Crossword

The actual age of a rock/event.
Animal that only eats meat.
Marine animals that make up the class crinoidea.
Diverse group of extinct reptile.
Process in which species disappear.
Preserved remains, impression, or trace of any once-living thing from a past geological age.
When was the earth created?
When did humans evolve?
Name a fossil.
Index fossils are used to date other fossils.
A fossil that is useful in dating other fossils.
Rapid decline of an entire species.
A solid inorganic substance of natural occurrence.
Dating of rocks or carbon using material of organic origin.
The age of a rock compared to something.
The age or a rock/event to compared to another rock/event.
A type of rock made from sedimentary.
Largest and only permanently populated town of the Svalbard archipelago.
Younger rock settled above older rock.
Extinct genus of sarcopterygian.
Name a fossil.
Plants from tropical climates.
Rupture in the crust of a planetary mass.
A type of sedimentary rock.
Divides an epoch into smaller parts.