Fossil Evidence

Magazine Stacks

Oldest are on bottom

Same is true of dirt

Oldest is on bottom

How are fossils formed?

Fossil Evidence in the StrataRocks settle based on size and change conformation

Based upon the amount of settling, relative age can be determined

Anachronistic Fossils

Anachronistic Fossils

What do fossils showOrganisms today resembled past organisms

Some organisms have not changed over a very long period of time (horseshoe crab)

Transitional species

Derived TraitsNewly evolved traits

Feathers

Ancestral TraitsPrimitive features that appear in ancestral forms

Teeth, tails, claws, eyes, etc