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Impact zone of giant meteorite confirmed
(DR Online) -- Following microscopic analysis of snow-samples taken last week, the
impact zone of the giant meteorite that hit southern Greenland last
December has been located.
Last week, astronomer Holger Pedersen and geophysicist Torben
Risbo of the University of Copenhagen conducted a preliminary
field investigation on the southwestern Greenland ice cap.
Collecting snow samples by helicopter, they hoped to find traces of meteorite dust left in the snow covering the glaciers. Some 40 samples were taken along 3 different lines giving a very preliminary profile of the snow-masses covering the glacier, where they scientists hope to find the meteorite -- If it did not evaporate during entry into the.
The samples were taken to
the Laboratory of
the Arctic Station at Qeqertarsuaq, Greenland, for microscopic
Risbo and revealed
definite signs of meteoritic substance. Sub-millimeter size particles that look like round brown
glass, with little tails of glass trailing behind them, were found. Other
particles seem to give
clues as to the crystal-structure of the meteorite, but this
can't be confirmed
until analysis has been conducted with an electron microscope.
A major field expedition on foot and by helicopter into the
impact zone planned
for the end of this month may have to be pushed forward. It now seems important to collect a much bigger
snow samples in order to narrow down the area to be
investigated. Also it
can't be ruled out that the meteorite, big as it was, completely
entry, and therefore the only traces will be just dust.