geology
High Island's Rhyolitic Rock Columns
Cooling volcanic material produced an unusual coastal pattern in silica-rich rock.
The story behind the place
The High Island Formation records a major ancient volcanic system in the Sai Kung region. As deposited volcanic material cooled and contracted, fractures developed into columns. Unlike the basalt columns familiar at many other sites, these are silica-rich rhyolitic volcanic rocks, making their composition an important part of their geological interest.
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Read more from the sources
- High Island's Rhyolitic Rock Columns — Hong Kong Agriculture, Fisheries and Conservation Department / Hong Kong UNESCO Global GeoparkHong Kong Agriculture, Fisheries and Conservation Department / Hong Kong UNESCO Global Geopark
- High Island's Rhyolitic Rock Columns — International Union of Geological SciencesInternational Union of Geological Sciences
