Massive volcanic provinces shape the Earth's crust and global environment

Nature · Published 19 October 2026 Swipe more like this →

In short: Researchers who analyzed large igneous provinces (LIPs)—massive accumulations of iron and magnesium-rich rocks—found that these features significantly alter the Earth's crustal structure. By examining three major categories of LIPs, including oceanic plateaus and continental flood basalts, the study revealed that these provinces can produce rock at rates exceeding the global output of entire mid-ocean ridge systems.

The study highlights how these provinces, which range from 20 to 40 km in thickness, originate from complex mantle circulation rather than standard seafloor spreading. Because they are so voluminous, they can reshape ocean basins and continental margins while impacting atmospheric and oceanic chemistry.

The researchers compiled data on LIPs younger than 250 million years to identify these patterns. However, the study notes that a lack of deep crustal data and precise ages means more seismic imaging and drilling are needed to fully understand these features.

Why it matters: Massive volcanic events are not just local phenomena; they are major drivers of Earth's geological and environmental history.

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