Geological Time Scale: A Journey Through Earth's History Timeline by De La Rosa

4.6 billion years ago: Formation of Earth

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

It began with a BANG and our planet Earth formed from the solar nebula, a cloud of gas and dust left over from the formation of the Sun. This marked the beginning of the Hadean Eon, characterized by intense meteorite bombardment and the formation of the early crust.

4.4 billion years ago: Formation of the Moon

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

A Mars-sized object collided with the young Earth, ejecting material that coalesced to form the Moon. This event played a crucial role in stabilizing Earth's axis and influencing its climate and tidal patterns.

3.8 billion years ago: Beginning of the Archean Eon

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The Archean Eon began, characterized by the formation of the first stable continents and the emergence of primitive life forms. The atmosphere was primarily composed of nitrogen, carbon dioxide, and water vapor. Also known as " The Origin of Life".

3.5 billion years ago: More evidence of life

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

Stromatolites, layered rock structures formed by photosynthetic microorganisms, appeared. These primitive life forms began to produce oxygen as a byproduct of photosynthesis, slowly changing Earth's atmosphere.

2.5 billion years ago: Start of the Proterozoic Eon

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The Proterozoic Eon began, marked by the oxygenation of the atmosphere and oceans. This 'Great Oxidation Event' led to the formation of the ozone layer and paved the way for more complex life forms.

1.1 billion years ago: Formation of the supercontinent Rodinia

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The first known supercontinent, Rodinia, formed. This massive landmass played a crucial role in the evolution of life and influenced global climate patterns.

541 million years ago: Beginning of the Phanerozoic Eon and Cambrian Period

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The Cambrian Explosion occurred, marking a rapid diversification of complex, multicellular life forms. This event is considered the dawn of modern animal phyla and the beginning of the Phanerozoic Eon.

359 million years ago: Start of the Carboniferous Period

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The Carboniferous Period (includes Mississippian and Pennsylvanian) began, characterized by vast swamps and forests that eventually formed coal deposits. This era saw the diversification of amphibians and the evolution of early reptiles.

252 million years ago: Permian-Triassic Extinction Event

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The largest known mass extinction in Earth's history occurred, wiping out about 95% of marine species and 70% of terrestrial vertebrate species. This event marked the end of the Paleozoic Era and the beginning of the Mesozoic Era.

201 million years ago: Beginning of the Jurassic Period

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The Jurassic Period began, famously known as the age of dinosaurs. This era saw the dominance of large reptiles, the evolution of birds, and the diversification of mammals.

66 million years ago: Cretaceous-Paleogene Extinction Event

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

A massive asteroid impact led to the extinction of non-avian dinosaurs and many other species. This event marked the end of the Mesozoic Era and the beginning of the Cenozoic Era (Age of the Mammals), paving the way for the rise of mammals.

2.58 million years ago to present: Quaternary Period

gladysdelarosa01 — 2024-09-14 21:35:11 UTC

The current geological period, characterized by recurring glacial and interglacial cycles. This period saw the evolution and spread of modern mammals and humans, as well as significant climate fluctuations that continue to shape our planet today.

460 million years ago: The middle of the Ordovician Period

gladysdelarosa01 — 2024-09-14 23:24:27 UTC

First fish species begin to appear and life on the continent was unvegetated). Land plants began to spread over the continents during the Silurian and by the Devonian Period amphibians began to appear.