A Little Ice Age May Have Assisted in the Roman Empire's Collapse

Learn what the rocks in Iceland tell researchers about climate conditions at the time of the Roman Empire’s collapse.

By Sam Walters
Apr 17, 2025 9:45 PMApr 24, 2025 10:04 PM
Greenland Zircon
Tiny zircon crystals separated out from ancient rocks from Greenland. The lines (called zoning) record the growth of the crystal in magmas over time, much like tree rings. (Image Credit: Dr Christopher Spencer, Queen's University, Canada)

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Rocks on the coast of Iceland couldn’t possibly tell us anything about the Roman Empire. Or could they? According to a study in Geology, a collection of rocks on Iceland’s coast reveals the severity of the Late Antique Little Ice Age — a period of climate change that may have contributed to the Roman Empire’s collapse.

“When it comes to the fall of the Roman Empire, this climate shift may have been the straw that broke the camel’s back,” said Tom Gernon, a study author and a professor at the University of Southampton in the U.K., according to a press release.

A Climate-Change Collapse

Though the collapse of the Roman Empire can be tied to a variety of factors, recent research has suggested that an ice age began on Earth in the 500s C.E., at about the time of the decline of the Roman Empire. Generated by ash clouds from three separate volcanic eruptions around 540 C.E., this ice age — the Late Antique Little Ice Age — blocked out the sun and cooled the surface of Earth for some 200 to 300 years, potentially playing a part in the empire’s end.

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