crack crack

Новости школы

Russian scientists found prints of leaves of sycamore and beech in the Arctic

iceberg

Scientists of the Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences first discovered the rocks of the Neogene (the second period of the Cenozoic era) on the island of Sardin, clear prints of leaves of sycamore, beech, alder, willow and magnolia fruit millions of years ago. Wednesday

"During a comprehensive expedition to the Lena River delta, scientists from the AA Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences went beyond the Arctic Circle to the island of Sardis to study the section of Neogene (23-2.5 million years) and Quaternary rocks. In the course of the work, the specialists found in the breed clear prints of leaves of plane tree, beech, alder, willow and magnolia fruit, which is a real sensation, "the report says.

The institute noted that this is a truly unique find, since no one has found prints of leaves of deciduous trees in this region before. Earlier, only mineralized, charred wood remains and conifer cones, as well as the fruits of the American gray walnut, were found in the sediments of the island of Sardis. Scientists believe that the detected leaf flora is of early-mid-Miocene age (23-11.6 million years). According to Leonid Khazin, a researcher at the micropaleontology laboratory, the words of which are given in the message, the most suitable conditions for broad-leaved trees in this area were about 16 million years ago.

"In order to take a fresh look at the ancient climate and its changes, it is necessary to more accurately determine the age of rocks containing unique finds and understand why vegetation of this type was widespread at such high latitudes. It is believed that in those days the continents already occupied a position close to modern, "said Khazin. Fossil heat-loving plants were previously found in the Arctic in sediments of more ancient age (about 65-55 million years), but in the younger sediments in the Eurasian part there were no such finds.

Scientists believe that the imprint of the plane leaf is an important proof that in the early-middle Miocene (23–11 million years), deciduous forests grew in the Arctic, which means it was warm and humid. Other specimens of the fossil flora of beech, alder and willow leaves also show this. Scientists call the magnolia fruit so far in the north to be an even more amazing find. No one has yet found this plant.

"The unique samples of broad-leaved flora discovered by our scientists will change the perception of the scale of climate variations in the geological past. In fact, today's so-called global warming is only a minor episode in the history of the Earth. And the climate swings swayed in the past without technogenic impact much more than Today, I believe that this work is worthy of publication in leading journals, such as Nature and Science ", are reported in the message to the words of the Director of INGG SB RAS Igor Yeltsov.

A SOURCE : ria.ru

all news arrow-right