History of Earth Crossword

The top layer is the youngest and the bottom layer is the oldest
The remains of preserved organisms
Determining the relative order without determining their absolute age
A fossil fish of the late Devonian period
They get food by killing and eating other animals
A mountain of hill that pours lava and magma out
A fossil reptile that's extinct
The state or process of a species, family, or larger group being or becoming extinct
The geologic age of a fossil
Any method of determining the age of Earth materials or objects of organic origin
The geologic age of a fossil organism, rock, geologic feature, or event, defined relative to other organisms, rock, etc.
Largest and only permanently populated town of the Svalbard archipelago
A subdivision of geologic time that divides an epoch into smaller parts
A large number of species within a relatively short period of geological time
A fossil that is useful for dating and correlating the strata in which it is found
A plant that grows naturally in a tropical climate
Name of fossil
Name a fossil
How many years ago did humans evolved
Earth's age
A sedimentary rock composed primarily of the mineral dolomite
A echinoderm of the class crinoidea
A rock that has formed from deposited by water or air
A solid inorganic substance of natural occurrence
Index fossils are used to date other fossils