Grading Rubric is HERE
Precambrian
Cambrian
Ordovician
Silurian
Silurian
Devonian
Carboniferous
Permian
Jurassic
Triassic
Triassic
Cretaceous
Tertiary
Quaternary
Precambrian
Cambrian
Ordovician
Silurian
Silurian
Devonian
Carboniferous
Permian
Jurassic
Triassic
Triassic
Cretaceous
Tertiary
Quaternary