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Yonaguni Monument

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Sunken formations

The Yonaguni Monument is a massive underwater rock formation off the coast of Yonaguni, the southernmost of the Ryukyu Islands, in Japan. While many archaeologists and geologists believe that it is a natural formation,[1][2] some hold the view that some of its features are man-made.[3]

Discovery

The sea off Yonaguni is a popular diving location in winter due to its large population of hammerhead sharks. In 1987, while looking for a good place to observe the sharks, Kihachiro Aratake, a director of the Yonaguni-Cho Tourism Association, noticed some singular seabed formations resembling architectonic structures.[1] Shortly thereafter, a group of scientists directed by Masaaki Kimura of the University of the Ryūkyūs visited the formations. Kimura is a strong advocate of the view that the formations are artificial.

The formation has since become a relatively popular attraction for divers, in spite of the strong currents.[1] In 1997, Japanese industrialist Yasuo Watanabe sponsored an informal expedition comprising writers John Anthony West and Graham Hancock, photographer Santha Faiia, geologist Robert Schoch, a few sport divers and instructors, and a shooting crew for British Channel 4 and Discovery Channel. Another notable visitor was freediver Jacques Mayol, who wrote a book on his dives at Yonaguni.[4] A plaque in his honor was fixed to the undersea formations after his suicide in 2001.

Main features

The Monument consists of medium to very fine sandstones and mudstones of the Lower Miocene Yaeyama Group, deposited about 20 million years ago.[2] Most of the significant formations are connected to the underlying rock mass (as opposed to being assembled out of freestanding rocks).

The formation called "The Turtle"

The main feature (the "Monument" proper) is a rectangular formation measuring about 150 m by 40 m, and about 27 m tall; the top is about 5 m below sea level. [5][6] [7] [8] Most of its top surface consists of a complex series of terraces and broad steps, mostly rectangular, bounded by near vertical walls.

Some of its peculiar details include

  • Two closely spaced pillars which rise to within eight feet of the surface;
  • The "Loop Road", a 5 m wide ledge that encircles the base of the formation on three sides;
  • The "Totem", a stone column about 7 m tall;
  • The "Dividing Wall", a straight wall 10 m long;
  • The "Gosintai", an isolated boulder resting on a low platform;
  • The "Turtle", a low star-shaped platform;
  • The "Triangle Pool", a triangular depression with two large holes dug at its edge;
  • The "Stage", an L-shaped rock.

Kimura claims to have identified at least 15 analogous formations off Yonaguni and Okinawa, including a castle, linked by submerged roads and water channels.

Interpretations

Artificial structures

The flat parallel faces, sharp edges, and mostly right angles of the formation have led many people, including many of the underwater photographers and divers that have visited the site and some scholars, to the opinion that those features are man-made. These people include Gary and Cecilia Hagland and Tom Holden who went on underwater expeditions to study and photograph the site as well as Dr. Sean Kingsley a marine archaeologist. These features include a trench that has 2 internal 90° angles as well as the twin megaliths that appear to have been placed there. These megaliths have straight edges and square corners. However sea currents have been known to move large rocks on a regular basis. [3][5][9][10] Even some of those who see the formations as being largely natural admit that it may have been modified by human hands.[2] The semi-regular terraces of the Monument have been compared to other examples of megalithic architecture, such as the rock-hewn terraces seen at Sacsayhuaman.[11] The formations have also been compared to the Okinawa Tomb, a rock-hewn structure of uncertain age.

Other evidence presented by those who favor an artificial origin include the two round holes (about 2 feet wide, according to photographs) on the edge of the Triangle Pool feature, and a straight row of smaller holes which have been interpreted as an abandoned attempt to split off a section of the rock by means of wedges, as in ancient quarries. Kimura believes that he has identified traces of drawings of animals and people engraved on the rocks, including a horse-like sign that he believes resembles a character from the Kaida script. Some have also interpreted a formation on the side of one of the monuments as a crude moai-like "face".

Supporters of artificial origin also argue that, while many of the features seen at Yonaguni are also seen in natural sandstone formations throughout the world, the concentration of so many peculiar formations in such a small area is highly unlikely. They also point out to the relative absence of loose blocks on the flat areas of the formation, which would be expected if they were formed solely by natural erosion and fracturing.

If any part of the Monument was deliberately constructed or modified, that must have happened during the last Ice Age, when the sea level was much lower than it is today (e.g. 39 m at 10,000 years BC). During the Ice Age, the East China Sea was a narrow bay opening to the ocean at today's Tokara Gap.[12] The Sea of Japan was an inland sea and there was no Yellow Sea; people and animals could walk into the Ryukyu peninsula from the continent. Therefore, Yonaguni was the southern end of a land bridge that connected it to Taiwan, Ryūkyū, Japan and Asia. This fact is underscored by a rock pillar in a now-submerged cave that has been interpreted as a fused stalactite-stalagmite pair, which could only form above water.

Prof. Masaaki Kimura first estimated that this must be at least 10,000 years old (8,000 BC) dating it to a time when it would have been above water. [13] He later revised his estimate as a result of the remains of marine organisms attached to some parts of the Monument have been carbon-dated 6,000 years old, so that would be an upper limit to the date of its construction. [5][14] Human presence in the Ryukyu Islands is believed to date from over 16,000 years ago, as attested for example by the Yamashita-cho bones (Yamashita Cave Man) (carbon-14-dated 32,000 years ago) and the Minatogawa Man skeletons (dated 16,000 years ago).[12][15]

The existence of an ancient stoneworking tradition at Yonaguni and other Ryukyu islands is demonstrated by some old tombs and several stone vessels of uncertain age.[2]

Natural formation

Some of those who have studied the formation, such as geologist Robert Schoch of Boston University, state that it is most likely a natural formation. Schoch observes that the sandstones that make up the Yonaguni formation "contain numerous well-defined, parallel bedding planes along which the layers easily separate. The rocks of this group are also criss-crossed by numerous sets of parallel and vertical (relative to the horizontal bedding planes of the rocks) joints and fractures. Yonaguni lies in an earthquake-prone region; such earthquakes tend to fracture the rocks in a regular manner."[2] [16] He also observes that on the northeast coast of Yonaguni there are regular formations similar to those seen at the Monument.[2][17] Schoch also believes that the "drawings" identified by Kimura are natural scratches on the rocks.[16]. This is also the view of John Anthony West.[1]

Other examples of natural formations with flat faces and sharp straight edges are the basalt columns of the Giant's Causeway and the natural staircase formation on Old Rag Mountain.[18]

See also

References

  1. ^ a b c d John Anthony West (1998). "Diving for Lemuria".
  2. ^ a b c d e f Robert M. Schoch (1999). "Yonaguni Enigmatic Underwater Monuments".
  3. ^ a b Masaaki Kimura (1991). Mu tairiku wa Ryukyu ni atta (The Continent of Mu was in Ryukyu). Tokuma Shoten. {{cite book}}: Unknown parameter |address= ignored (|location= suggested) (help); Unknown parameter |note= ignored (help)
  4. ^ Jacques Mayol. Heritage des Peuples de la Mer.
  5. ^ a b c Ancient Discoveries: Lost Cities of the Deep History Channel
  6. ^ "Skematic drawing of the Monument at the Ishigaki, Okinawa city site".
  7. ^ "Schematic maps of the Monument at the Alternative Archaeology site".
  8. ^ Doremon360. "3D model of the Monument".{{cite web}}: CS1 maint: numeric names: authors list (link)
  9. ^ Histories Mysteries: Japan's mysterious pyramids History channel
  10. ^ "Umi ni shizunda chō-kodai bunmei (The Submerged Ancient Civilizations)". Quark. Kōdansha. 2002.
  11. ^ "Finely chiseled rock steps at the ruins of Sacsayhuaman outside of Cuzco". Retrieved November 16, 2008.
  12. ^ a b "The Ryukyuanist - A Newsletter on Ryukyuan/Okinawan Studies, Number 57" (DOC). Autumn 2002. Retrieved November 2008. {{cite web}}: Check date values in: |accessdate= (help)
  13. ^ Histories Mysteries: Japan's mysterious pyramids History channel
  14. ^ Wolf Wichmann (March 2001). "Confronting Yonaguni - Chapter Twenty Seven". Retrieved November 2008. {{cite web}}: Check date values in: |accessdate= (help)
  15. ^ Hisashi Suzuki (1982). "The Minatogawa Man - The Upper Pleistocene Man from the Island of Okinawa". Bullettin of the University Museum. 19. University of Tokyo. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  16. ^ a b "Japan's Ancient Underwater "Pyramid" Mystifies Scholars".
  17. ^ "National Geographic News Photo Gallery: Asian "Atlantis" Shows Strange Structure".
  18. ^ "Hiker's Guide to the Geology of Old Rag Mountain" (PDF).

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