Seventeen Olmec colossal basalt heads are known, 16 found in situ. They weigh roughly 6 to 25 tons each; La Venta Monument 1 is the largest, not a 50-ton head. Their basalt came from the Sierra de los Tuxtlas, commonly placed about 50 km from San Lorenzo. No transport method is established; balsa-wood rafts are one proposal. Dr. Ed Barnhart's nautical model estimated that a raft carrying a 5-ton load would be too large for the Coatzacoalcos River's constrictions. How the Olmec moved the heads remains unresolved.
Olmec Colossal Heads Weigh Up to About 25 Tons; Transport Remains Unclear

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Key facts
- Seventeen Olmec colossal heads are known; 16 were found in situ at archaeological sites.
- La Venta Monument 1 is the largest head, estimated at about 24 tons, not 50 tons. The smallest weighs about 6 tons.
- The basalt was quarried in the Sierra de los Tuxtlas, generally about 50 km from San Lorenzo; no 90–100 km transport route is established.
- No transportation method has been established. Balsa-wood rafts are one proposed method.
- Dr. Ed Barnhart's nautical model estimated that a raft carrying a 5-ton load would be too large to negotiate the Coatzacoalcos River's constrictions.
- How the Olmec moved the heads remains unresolved.
Sources
Olmec colossal heads - Wikipediaen.wikipedia.org
The Olmec colossal heads are stone representations of human heads sculpted from large basalt boulders. They range in height from 1.17 to 3.4 metres (3.8 to 11. ...
The Olmec Colossal Heads - History Hithistoryhit.com
The Olmec colossal heads are believed to depict local rulers or other people of great importance. There are many mysteries surrounding these monuments of ...
Olmec Colossal Stone Heads - World History Encyclopediaworldhistory.org
The heads can be nearly 3 m high, 4.5 metres (9.8 feet, 14.7 feet) in circumference and average around 8 tons in weight. The heads were sculpted ...
Olmec Colossal Heads - Smarthistorysmarthistory.org
16 heads, ranging from 1.47 m to 3.4 m in height and weighing between 6 and 25.3 tons, have been recovered from the three main Olmec archaeological sites.
Smart Traveler's Guide To The Olmec Heads - Caravan Tourscaravan.com
The Olmec Colossal Heads are stunning, massive stone sculptures created by the Olmecs, a Mesoamerican civilization predating the Maya and the Aztecs. Step into ...
Olmec colossal head monument 1 from the La Venta site.lithiccastinglab.com
This colossal statue is made of basalt and has an estimated size of 8 feet 1 inch (2.46 m) high and weighs 24 tons. Stirling describes his ...
Offering #4, La Ventasmarthistory.org
Offering #4 (Olmec), c. 900 – 400 B.C.E., serpentine, jadeite, and granite, figures 6-5/16 to 7-15/16 inches tall, celts 9-5/16 to 10-3/4 inches tall, La ...
<펌>Olmec colossal heads : 네이버 블로그blog.naver.com
large weigh between 8 and 10 tons. Monument 1 measures 2.41 metres (7.9 ft) high by 2.08 metres. The monument weighs almost 20 tons. It weighs ...
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