Around 200 million years ago during the Early Jurassic, the supercontinent Pangea began to fragment, dramatically reshaping Earth’s surface. As the landmass split apart, continents drifted away from one another and vast new oceans formed, gradually creating the global geography we recognize today. For decades, geoscientists believed that the Pangea breakup was primarily driven by …
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In 1869, geologist John Wesley Powell made a startling discovery while exploring the Grand Canyon: a 520-million-year-old rock layer resting directly atop rocks 1.4 to 1.8 billion years old. Nearly a billion years of geological history appeared to be missing. This vast temporal gap, now known as the Great Unconformity, is not unique to the …
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Earth’s climate has oscillated for hundreds of millions of years between cold “icehouse” states and warm “greenhouse” periods, largely in response to changes in atmospheric carbon dioxide. Volcanoes are often assumed to have played a constant role in regulating this balance, but new modelling research suggests their climatic influence—particularly from volcanic arcs—emerged much later in …
Deep beneath the Afar region of East Africa, scientists have uncovered a phenomenon that reshapes our understanding of the planet’s inner workings: the Afar mantle pulse. This rhythmic movement of molten rock rising from the mantle behaves like a heartbeat, signaling a living, dynamic Earth. The study, published in Nature Geoscience and led by geologist …
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The Himalayas, the planet’s highest mountain range, have long inspired scientific curiosity about how such colossal peaks can remain stable over millions of years. For decades, geologists believed that the immense weight of these mountains rested solely on an unusually thick section of the Earth’s crust. This long-standing view, dating back to Swiss geologist Émile …
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Beneath the surface of North America, geologists have made a striking discovery: the deep roots of the continent are not as immovable as once believed. Researchers from the University of Texas at Austin have observed that the ancient continental foundation is undergoing a slow, rare process called cratonic thinning. Instead of remaining stable for billions …
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Geoscientists at the University of Toronto have made a major discovery that reshapes our understanding of plate tectonics, particularly regarding oceanic plates. Their study, published in Geophysical Research Letters, reveals that the Pacific Plate—which spans most of the Pacific Ocean floor—is undergoing active deformation due to deep-sea faults. This groundbreaking research introduces a more dynamic …
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Geophysicists at ETH Zurich have uncovered surprising findings about the Earth’s mantle that challenge conventional plate tectonic theories. Using advanced seismic models, the researchers identified unexpected anomalies resembling submerged tectonic plates, located far from known subduction zones. These discoveries raise questions about the composition and dynamics of Earth’s interior and suggest the need to rethink …
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Caltech researchers have unveiled a groundbreaking method to probe the deep structure of the Earth, particularly at the Mohorovičić discontinuity, known as the Moho. This method employs the advanced technology of distributed acoustic sensing (DAS), akin to performing an ultrasound on the Earth. Their study, detailed in Science Advances, capitalizes on how seismic waves from …
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The Indian Ocean gravity hole, a unique geophysical anomaly, has intrigued scientists since its discovery in 1948 by Dutch geophysicist Felix Andries Vening Meinesz. Unlike typical gravitational phenomena, this gravity hole, officially known as the Indian Ocean geoid low (IOGL), repels rather than attracts surrounding materials, creating significant depressions in oceanic water levels. The most …
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