Ganh Da Dia
reef in Vietnam
Gành Đá Đĩa or Ghềnh Đá Đĩa (literally meaning "The Sea Cliff of Stone Plates") is a seashore area of uniformly interlocking basalt rock columns located along the coast in An Ninh Đông, Tuy An District, Phú Yên Province, Vietnam. The site features approximately 35,000 dark lava columns with roughly flat surfaces in various polygonal shapes, resembling a gigantic beehive or a stack of dinner plates, which inspired its name. The formation spans about 100 meters in width and 250 meters in length. Recognized for its unique geological and scenic value, Gành Đá Đĩa was designated a National Scenic Site in 1997 and elevated to a National Special Relic in 2020.
Formation
The rock columns at Gành Đá Đĩa originated from volcanic activity millions of years ago in the central highlands of what is now Đắk Lắk Province. Molten basalt flows from eruptions in the Vân Hòa Plateau encountered cold seawater, causing rapid cooling and contraction that resulted in the characteristic polygonal cracking. This process formed vertical columns that further fractured horizontally due to wave action, creating the disk-like appearance. The main area consists of two promontories extending into the sea: a northern one with inclined and curved columns, and a southern one with mostly upright columns forming stepped levels from low to high.
Cultural significance
Local folklore attributes the site's origin to supernatural events. One legend describes it as a treasure hoard of gold and jewels that was set ablaze by thieves, only to be transformed into stone by a whirlwind and explosion.
The public source identifies “Ganh Da Dia” as reef in Vietnam. This brief keeps that definition visible, then builds a research path around Ganh, reef and Vietnam.
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This entry incorporates text from “Ganh Da Dia” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.