Geochronology is the scientific discipline focused on determining the absolute and relative ages of rocks, minerals, fossils, and geological events, thereby establishing the temporal framework of Earth’s history. It relies on quantitative dating methods, primarily radiometric techniques such as U–Pb, Ar–Ar, Rb–Sr, and Sm–Nd systems, which exploit the known decay constants of radioactive isotopes in specific mineral phases. These data are integrated with stratigraphic principles and chronostratigraphic units to construct calibrated timescales, constrain rates of tectonic, magmatic, and surface processes, and correlate geological records across regions and datasets.
Many people are familiar with fossilized wood as a decorative item from a museum shop. However, the fact that it can preserve the geological history of entire regions spanning millions of years is a new discovery. A research ...
Earth Sciences
Jul 24, 2026
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177
Calculating a fossil's position throughout geological history is a complex process. In paleontology and other disciplines, determining a location in the past is a challenge that requires refined computational tools to process ...
Paleontology & Fossils
Jul 20, 2026
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124
For more than 150 years, scientists have debated when and how the Colorado River first carved its way through the Grand Canyon. Now, a new study led by researchers at the University of New Mexico offers evidence that the ...
Earth Sciences
Jul 9, 2026
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27
New research by Brown University geologists confirms that the Aleutian Islands, the archipelago stretching from Alaska to Russia's Kamchatka Peninsula, experienced a massive geological uplift between 5 million and 7 million ...
Earth Sciences
Jun 26, 2026
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33
In the Pilbara of Western Australia, some of Earth's oldest rocks lie beneath the sky, as they have for billions of years. They are dark, weathered volcanic rocks, close to 3.5 billion years old, cut by veins and stewed by ...
Earth Sciences
Jun 24, 2026
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14
Curtin University researchers have determined the most precise age yet for the oldest known impact crater on Earth, providing new insight into how meteorite strikes shaped the planet during its earliest history.
Earth Sciences
Jun 23, 2026
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279
A new study published in Precambrian Research by Jawad Shabbir, a Ph.D. student at Peking University's School of Earth and Space Sciences under Professor Song Shuguang, addresses a critical yet poorly understood period in ...
Earth Sciences
Jun 8, 2026
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16
Scientists at the University of Melbourne have uncovered for the first time how Australia's iconic Twelve Apostles were formed, finding tectonic plate movements over millions of years lifted and tilted the giant structures ...
Earth Sciences
Apr 23, 2026
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162
Geologists have solved the mystery of the disappearance from the geological record, millions of years ago, of one of North America's most important waterways: the Colorado River. A paper published in Science shows that the ...
Earth Sciences
Apr 17, 2026
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1265
Geoscientists have long relied on different forms of lead to understand Earth's geological history and how it was created over billions of years. However, there is a mystery that has been puzzling scientists for decades: ...
Earth Sciences
Apr 10, 2026
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70
