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Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System . Initially, Earth was molten due to extreme volcanism and frequent collisions with other bodies.
- History of Earth - Wikipedia
The history of Earth concerns the development of planet...
- Geologic time scale - Wikipedia
The geologic time scale, proportionally represented as a...
- Geology - Wikipedia
The geological time scale encompasses the history of the...
- Geological history of Earth - Simple English Wikipedia, the free ...
Geological history of Earth. Earth's geological history is a...
- History of Earth - Wikipedia
5 apr 2024 · Geologic time is, in effect, that segment of Earth history that is represented by and recorded in the planet’s rock strata. timeline of Earth's history. Significant moments in Earth's history. Grand Canyon rock layering. The steep walls of the Grand Canyon contain a number of layers of sedimentary rock laid down over millions of years.
- The Editors of Encyclopaedia Britannica
Geologic time is the timescale used to calculate dates in the planet's geologic history from its origin (currently estimated to have been some 4,600 million years ago) to the present day. Radiometric dating measures the steady decay of radioactive elements in an object to determine its age.
