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Questions and Responses
Posted April 29,1998
Question
Team: Attach blocks to ends of statues, i.e. head and feet. These blocks
would have rounded outsides, where they touch the ground, thus turning
the statues into cylinders of a sort, and roll them along roads or
wooden rails to the site. Near the site build a ramp of sand and roll
statue up it, then dig out in order to place, like Egyptians did with
obelisks.
(name withheld by request)
Response from Ted Ralston
The technical capabilities of the ancient Polynesians were quite
incredible and certainly encompassed the use of rollers, which are
cylinders. However, no one has yet evaluated the encasing concept from
the point of view of materials or technique. There is no evidence of any
type of encasing material in the record of the land, however.
Question
I would like to know if it is possible the moai statues could have been
loaded on to some sort of boat and then sailed or rowed to the other
side of the island? Would there be resources on the island for them to
build a boat & are the waters calm enough to carry a statue that big
safely around the island?
(name withheld by request)
Response from Jo Anne Van Tilburg
The waters are often very rough. Coastal loading areas in the vicinity
of the statue quarry are not known. However, "canoe ramps" exist in some
areas, that may have been used for loading rafts. No clear evidence is
available, but the concept is feasible.
Question
One method which has not been fully explored is the possibility that the
moai were transported to their respective ahu (platforms) via rafts.
Since Rano Raraku (the quarry), is relatively near the water, and since
the vast majority of ahu are situated on the coastline - it would not be
unreasonable to posit the use of rafts to transport the moai around the
perimeter of the island.
This seems to me at least as feasible as the prevailing theories of
dragging the statues over remarkably rocky and hilly terrain.
David Brookman
Philadelphia, PA
Response from Jo Anne Van Tilburg
The use of rafts as you describe is not an unreasonable hypothesis;
although there is no archaeological evidence of a coastal loading site,
canoe ramps exist and could have been used to load statues on ramps.
However, overland transport is clear and unquestionable for 97 statues.
Thanks for the interest.
Question
The various theories of moving the statues by pivoting, tilting,
rocking, etcetera seem to consider the terrain as it exists today. It
seems that the first requirement to move an object from point
A to point B is that there must exist a relatively smooth or navigable
route between the two points. This may have been a natural or artificial
path of earth and/or sand or other material since eroded away. Once you
have established the relatively smooth path the task of movement without
damage is much easier. Then methods of mechanical advantage such as
levers, inclined planes, pulleys, etc. of various arrangements could do
the job. It is interesting to think of the possibilities if they had ice
available, or the means of making ice. At any rate I'm suggesting that
the neoliths had to be transported over a relatively smooth path.
Robert Homan
Las Vegas, NV
Response from Jo Anne Van Tilburg
In fact, the known transport roads are relatively accommodating but only
very perfunctory and often smooth. The terrain is quite hilly. No ice is
available, then or now. Thanks for the interest.
Question
Why isn't it possible that the island was settled from both east and
west? From both Polynesia and Peru?
terryglss
Response from Ted Ralston
The evidence from language, culture, technology, and artifacts clearly
supports west to east propagation. Recent experimental voyaging with
Polynesian double canoes has provided the final missing ingredient, i.e.
a validation of upwind sailing and non-instrumental navigation.
Question
One theory that probably has not been considered is the use of water on
land to move the megaliths. I don't mean floating them on a barge down
a river, but actually constructing a large portable trough or tank that
is filled with water. The megalith is tied to a raft-like structure and
the tank is built around the megalith. The tank is filled with water and
the megalith is slid or floated forward in the tank. The tank is then
deconstructed and shifted forward to allow for the next shift of the
megalith. Have you seen how a canal or a ditch is reinforced on the
sides when under construction? As the digging progresses, the sides are
shifted forward and relocated. Water is obviously a plentiful resource
for the island, and the fact that many of these giant stones were moved
makes it seem slightly plausible that water could be used on land as
part of the plan.
Corrine Terebas
Buffalo, New York
Response from Ted Ralston
No theory can ever be discounted - some have more support than others
do. The present evidence does indicate that a relatively fixed amount of
material (rocks) was used in the "work train" that accompanied a moai in
motion. Whatever ramps, platforms, or fillers were required were
constructed with this loose material, then deconstructed as that step
was accomplished - very similar to the modern use of scaffolding, wall
forms, blocking, etc. However, the concept of water tanks has not been
considered.
Question
Could the statues have been created "on sight" out of chunks of lava
left from ancient eruptions of volcanoes rather than moved after
carving?
(name withheld by request)
Response from Jo Anne Van Tilburg
The archaeological record is very clear: the statues were all finished
prior to moving them to their ahu sites. The pukao were shaped on site
and the surface of the statues smoothed before being lifted into place.
Question
As a lay person, I'd say they used log-rollers to transport the statue.
To erect the statue I'd guess that they used a wooden backdrop and
log-rollers and used ropes to pull it up the wooden backdrop with the
help of the same log-rollers. Sorta like the Egyptians used to erect
obelisks.
Charles Ertel
Schenectady NY
Response from Jo Anne Van Tilburg
Log rollers are reasonable to assume and we have tested palmwood
rollers. They function perfectly when fresh.
Question
Wouldn't be possible with their mortar technology to mix and form these
stones in place, and shape these forms in the exact spots they now rest?
(name withheld by request)
Response from Jo Anne Van Tilburg
The carving process, from beginning to final stages, is clearly evident
in the quarry, where all but about 30 statues were carved. These 30 came
from other, smaller quarries and were transported, finished, to their
final sites. Thanks for your interest.
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