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Another ‘Stonehenge’ discovered in Amazon
Posted on Thursday, June 29, 2006 (CDT) by Thoth
 A grouping of granite blocks along a grassy Amazon hilltop may be the vestiges of a centuries-old astronomical observatory — a find that archaeologists say shows early rainforest inhabitants were more sophisticated than previously believed.
The 127 blocks, some as high as 9 feet (2.75 meters) tall, are spaced at regular intervals around the hill, like a crown 100 feet (30 meters) in diameter. On the shortest day of the year — Dec. 21 — the shadow of one of the blocks disappears when the sun is directly above it.
"It is this block's alignment with the winter solstice that leads us to believe the site was once an astronomical observatory," said Mariana Petry Cabral, an archaeologist at the Amapa State Scientific and Technical Research Institute. "We may be also looking at the remnants of a sophisticated culture."
Anthropologists
have long known that local indigenous populations were acute observers
of the stars and sun. But the discovery of a physical structure that
appears to incorporate this knowledge suggests pre-Columbian Indians in
the Amazon rainforest may have been more sophisticated than previously
suspected.
"Transforming this kind of
knowledge into a monument; the transformation of something ephemeral
into something concrete, could indicate the existence of a larger
population and of a more complex social organization," Cabral said.
May be 2,000 years old
Cabral has been studying
the site, near the village of Calcoene, just north of the equator in
Amapa state in far northern Brazil, since last year. She believes it
was once inhabited by the ancestors of the Palikur Indians, and while
the blocks have not yet been submitted to carbon dating, she says
pottery shards near the site indicate they predate Columbus' voyages
and may be much older — as much as 2,000 years old.
Last month, archaeologists
working on a hillside north of Lima, Peru, announced the discovery of
the oldest astronomical observatory in the Western Hemisphere — giant
stone carvings, apparently 4,200 years old, that align with sunrise and
sunset on Dec. 21.
While the Incas, Mayans and
Aztecs built large cities and huge rock structures, pre-Columbian
Amazon societies built smaller settlements of wood and clay that
quickly deteriorated in the hot, humid Amazon climate, disappearing
centuries ago, archaeologists say.
Farmers and fishermen in
the region around the Amazon site have long known about it, and the
local press has dubbed it the "tropical Stonehenge." Archaeologists got
involved last year after geographers and geologists did a
socio-economic survey of the area, by foot and helicopter, and noticed
"the unique circular structure on top of the hill," Cabral said.
Valuable for studying Amazon history
Scientists not involved in the discovery said it could prove valuable to understanding pre-Columbian societies in the Amazon.
"No one has ever described
something like this before. This is an extremely novel find — a
one-of-a-kind type of thing," said Michael Heckenberger of the
University of Florida's Department of Anthropology.
He said that while carbon
dating and further excavation must be carried out, the find adds to a
growing body of thought among archaeologists that prehistory in the
Amazon region was more varied than had been believed.
"Given that astronomical
objects, stars, constellations, etc., have a major importance in much
of Amazonian mythology and cosmology, it does not in any way surprise
me that such an observatory exists," said Richard Callaghan, a
professor of geography, anthropology and archaeology at the University
of Calgary.
Brazilian archaeologists will return in August, when the rainy season ends, to carry out carbon dating and further excavations.
"The traditional image is
that some time thousands of years ago small groups of tropical forest
horticulturists arrived in the area and they never changed — (that)
what we see today is just like it was 3,000 years ago," Heckenberger
said. "This is one more thing that suggests that through the past
thousands of years, societies have changed quite a lot."
Copyright: MSNBC.com
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