Current Refinements of Stratigraphy
Biostratigraphy
Absolute Age Dating
Major Events in Earth History
Origin of the Earth
Early Development of the Continents
Plate Tectonics & Earth History
Origin & Evolution of Life
Precambrian
Paleozoic
Mesozoic
Cenozoic
Biostratigraphy
Absolute Age Dating
Major Events in Earth History
Origin of the Earth
Early Development of the Continents
Plate Tectonics & Earth History
Origin & Evolution of Life
Precambrian
Paleozoic
Mesozoic
Cenozoic