Geological Periods
Geologic time scale (GTS), a system of chronological dating used to show events that have occurred in Earth’s history
Table of Contents
Precambrian Times (Most Ancient)
All time before life existed, Earth was still a volatile environment, though the origins of life came around during this period.
• Origins of Life on Earth
• First Life on Earth
• Cell Development & Diversification
Cambrian Period
The development of multi-cellular organisms, including sponges, primitive animals, and various plant life, diversifying from old species
• Multicellular Organisms
• Primitive Animals
Ordovician > Permian Periods
The transition from primitive species to specialized organisms, the increasing of genetic diversity via sex, and the transition from sea to land
• Arthropods
• Insecta – One of The Arthropods
• Fish
Triassic / Jurassic Periods
The arrival and dominance of dinosaurs in the air, land, and sea, and how they developed from their ancestors and the causalities of their existence
• Amphibians & Early Reptiles
• The Dinosaurs
Cretaceous Period
The removal of dinosaurs from planet Earth and the emergence of mammals and other more complex organisms
• Dinosaur Extinction
• Mammals Ancestors
Tertiary Period
The evolution of man and further diversification of all species to the present date. The transition of Neanderthal man to modern man.
• Early Mammals
• The Hominids
Quaternary Period
The evolution of man and further diversification of all species to the present date. The transition of Neanderthal man to modern man, and how our dominance of planet Earth has directly shaped the future timeline of planet Earth.
• The Homo Species
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