The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs.

This time represents Earth’s earliest history, during which the planet was characterized by a partially molten surface, volcanism, and asteroid impacts. Several mechanisms made the newly forming Earth incredibly hot: gravitational compression, radioactive decay, and asteroid impacts.

This article assembles some of the key events. From evolution to extinction, these are events that have unfolded as part of the Earth timeline. Though opinions vary, we’ve leaped through 4.5 billion years of Earth’s history and provided a general guideline.

2019年8月21日 · A history-of-Earth timeline includes everything from the birth of the sun and solar system to present-day earthquakes in California. Changes over the past 4.6 billion years were usually slow and incremental, but also sometimes violent and …

Over millions of years, this disc of gas coalesced into the planets of the solar system, including Earth. Over its history, Earth has gone through several distinct periods that are divided by shifts in the Earth’s geological composition or major paleontological changes, such as mass extinctions.

The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy).

Geologic history of Earth, evolution of the continents, oceans, atmosphere, and biosphere; the layers of rock at Earth’s surface contain evidence of the evolutionary processes undergone by these components of the terrestrial environment during the times at which each layer was formed.

2025年1月17日 · geologic time, the extensive interval of time occupied by the geologic history of Earth. Formal geologic time begins at the start of the Archean Eon (4.0 billion to 2.5 billion years ago) and continues to the present day.

The history of the Earth describes the most important events and stages in the development of the planet Earth from its formation to the present day. The age of the Earth is about 4.56 billion years. [3] Nearly all branches of science have helped us understand the main events of the Earth's past. There has been constant geological change and ...

2025年1月9日 · One of the major objectives of geology is to establish the history of the Earth from its inception to the present. The most important evidence from which geologic history can be inferred is provided by the geometric relationships of rocks with respect to each other, particularly layered rocks, or strata , the relative ages of which may be ...