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The following five timelines show the geologic time scale to scale. The first shows the entire time from the formation of the Earth to the present, but this gives little space for the most recent eon.
Earth formed in this manner about 4.54 billion years ago (with an uncertainty of 1%) [25] [26] [4] and was largely completed within 10–20 million years. [27] In June 2023, scientists reported evidence that the planet Earth may have formed in just three million years, much faster than the 10−100 million years thought earlier.
A megaannus (Ma) represents one million (10 6) years. The geologic time scale or geological time scale ( GTS ) is a representation of time based on the rock record of Earth . It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (a scientific branch of geology that aims to ...
Earth’s magnetic field was once 30 times weaker than it is today. This change may have played a pivotal role in the blossoming of complex life, new research found.
The findings challenge the existing theory that the planet was completely covered by ocean four billion years ago. Fresh water present on Earth ‘500 million years earlier than previously thought ...
This template is designed for maps of the world or east hemisphere, showing historical borders and detailed geography. The dates refer to the year depicted in the maps, not when they were made. Note: Please only include maps based on the Topographic_map#Global_1-kilometer_map , and only maps showing historical information about countries ...
The design may have inspired later 'Maps of World History' such as the HistoMap by John B. Sparks, which chronicles four thousand years of world history in a graphic way similar to the enlarging and contracting nation streams presented on Adam's chart. Sparks added the innovation of using a logarithmic scale for the presentation of history.
The 22 maps of the Geological Atlas of the World were co-published by CGMW and UNESCO from 1974 to 1984. In January 1983, the wall map concept of the Geological Map of the World was revived at the UNESCO G.A. [10] and the 1st edition at 1:25M scale was published in 1990. For the first time, continental geology was shown, alongside ocean geology ...