Buzadağs from glaciers in Greenland can carry rocks to the distant shores
Professor Ross Mitchell
The rocks, which moved from Greenland to Iceland by the icebergs, prove that the climate in Europe has cooled for one or two centuries in 540 AD, a “mini glacier age olan that may have played a role in the autumn of the Roman Empire.
This cold period in the northern hemisphere, which was previously mentioned by the work of tree rings and sediment seeds, was associated with a series of historical events in the world, from the collapse of the North Wei dynasty in China to the fall of Teotihuacan in Central America. In the 540s, the plague of the Justinian, which influenced the Eastern Roman Empire, may also be partly caused by a colder climate.
Christopher Spencer Canada decided to discover a beach at the University of Kingston and his colleagues on the west coast of Iceland, because satellite photographs showed that all other beaches in Iceland were light -colored instead of basalt black.
It turned out that this is due to the presence of a large number of barks, but as Spencer walked in the area, Spencer saw Albanian pavement granite stones. Therefore, it was clear that these rocks were not from Iceland. “How easy it is to discover is a little embarrassing, or he says.
Of course, an analysis of rocks confirmed that they have come from many different places in Greenland, about 300 kilometers away at the closest points in Greenland. This means that Spencer should be moved by the icebergs that calm down from the glaciers in Greenland and were washed on the beach.
Spencer, the beach layer, where Greenland rocks are located, was previously dated to AD 500 up to 700. While the icebergs from Greenland still reached this region, the Greenland rocks could not be found in another layer of the beach.
A collection of ancient rocks analyzed in the study until Greenland
Dr Christopher Spencer
Therefore, the discovery shows that a large number of Greenland icebergs were washed on this beach when this layer was formed. This shows that Greenland’s glaciers have grown and many other refrigerators are calm in this period because of colder conditions, Spencer says Spencer.
This is called the era of small glaciers, sometimes with evidence for a colder period. The cause of this incident is uncertain – some think that the volcanoes are triggered by the volcanoes, while others are triggered by parts of the comet of a striking world. Spencer thinks how much of the sun’s temperature reaches the world.
But some question the history of refrigerator beds. ULF BNTGEN His team thinks that a colleague in Iceland had accumulated thousands of years ago at the University of Cambridge, who found evidence of tree ring for this cold period.
While the climate contributes to events such as the fall of Rome, there is evidence that climate changes shape the fate of many civilizations.
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