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1991-02-17
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Plant-Eating Dinosaur Found in Antarctic
Copyright, 1989. The Associated Press. All rights reserved.
LONDON (AP) -- Fossil bones of a plant-eating dinosaur found in the
Antarctic prove there was a mild climate there 70 million years ago, a
British scientist said Thursday.
"We discovered jawbones, much of the vertebral column and the fore
limbs, which identify the animal as a bird-hipped dinosaur similar to
hypsilophodon, which has been found in Australia, North Amerca, Europe
and possibly North Africa," said Michael Thomson, a scientist who led an
expedition to the area.
"There could not have been much ice or snow in the region in those
days because the dinosaur was a land animal and it wouldn't have liked
frosty nights."
He said the dinosaur was about 10 feet long and walked on its hind
legs.
Thomson, 46, spoke in a telephone interview from Cambridge, where he
is head of geology at the British Antarctic Survey.
He said the expedition also found shells, especially ammonites;
fossilized leaves from conifers and broad-leaved trees, as well as tree
trunks and ferns, proving there was a food source for the dinosaur.
Thomson said the fossils were found during a six-week geological
research cruise this year around the north and east of James Ross Island
in British Antarctic Territory, 700 miles from the tip of South America.
He said the dinosaur bones were picked up and given to him by Peter
Bengtson, a Swedish paleontologist who joined scientists from Britain,
Brazil, Australia and New Zealand for the voyage on the survey ship John
Biscoe.
"Three years ago, we found some bones of a marine reptile, the
plesiosaur, and as Argentine geologists had found fragments of an
armored dinosaur in Antarctica, I knew it was a likely place for other
finds," Thomson said.
The bones were in shallow-water marine rocks and Thomson said the
beast probably died on land and floated out to sea before becoming
buried and fossilized.
"There were active volcanoes nearby in those times and the area would
have been something like Indonesia is today," he added.
Thomson described the area as several square miles of bare rock with
only mosses and lichens -- "and not many of those" -- growing there now.
The continents in the Southern Hemisphere were once a single land
mass that has been named Gondwanaland. About 150 million years ago, it
began to split apart, eventually to form South America, Africa,
Australia and Antarctica.
The newly found dinosaur would have been one of the last of its kind
because the animals were starting to die out about that time, when
Antarctica was still close to South America and Australia was only
starting to break away, Thomson said.
The bones are now under study at the Natural History Museum in
London, where they may eventually be put on display.