Paleoenvironments is the study of ancient environments, including the physical, chemical, and biological conditions that existed in the past.

The Phanerozoic Eon is divided into eras, periods, and epochs, and represents the time from the appearance of abundant fossils to the present day.

The Mesozoic Era, also known as the Age of Reptiles, lasted from approximately 252 million years ago to 66 million years ago.

The Carboniferous Period, also known as the Coal Age, lasted from approximately 359 million years ago to 299 million years ago and is characterized by the dominance of amphibians.

The Cretaceous-Paleogene Extinction Event, also known as the K-Pg Extinction Event, occurred approximately 66 million years ago and is associated with the extinction of the dinosaurs.

The Holocene Epoch, also known as the Recent Epoch, began approximately 11,700 years ago and is characterized by the emergence of humans.

The Geologic Time Scale is a system of chronological measurement that is used to date rocks and fossils.

The Archean Era, also known as the Precambrian Era, lasted from approximately 4 billion years ago to 2.5 billion years ago and is characterized by the formation of the Earth's crust.

The Devonian Period, also known as the Age of Fishes, lasted from approximately 416 million years ago to 359 million years ago and is known for its abundant marine life.

The Neogene Epoch, which includes the Miocene and Pliocene epochs, lasted from approximately 23 million years ago to 2.6 million years ago and is characterized by the dominance of mammals.

The Permian-Triassic Extinction Event, also known as the Great Dying, occurred approximately 252 million years ago and is associated with the mass extinction of many marine species.

The Permian Period, also known as the Age of Reptiles, lasted from approximately 299 million years ago to 252 million years ago and is characterized by the dominance of reptiles.

The Geologic Time Scale is a system of chronological measurement that is used to divide the Earth's history into eons, eras, periods, and epochs.

The Hadean Era, also known as the Precambrian Era, lasted from approximately 4.6 billion years ago to 4 billion years ago and is characterized by the formation of the first life on Earth.

The Carboniferous Period, also known as the Coal Age, lasted from approximately 359 million years ago to 299 million years ago and is known for its abundant plant life.