| Item | Hong Kong |
Giant Causeway | Penghu Ocean Geopark |
|---|---|---|---|
| Location | Sai Kung, |
Ireland,United Kigdom | Penghu Archipelago |
| Lithology | Rhyolitic tuff (acidic) | Basalt (basic) | Basalt ( basic) |
| Age | 140 million years ago | 60 million years ago | 17.4 – 8.2 million years ago |
| Geological Time | Late Cretaceous | Paleogene | Mid-late Miocene |
Area( km2) |
100 | 0.7 | 1.64 |
| Strata thickness( m) | 400 | 28 | 75 |
| Status | Global Geopark(2011) |
World Natural Heritage |
National Geopark |
Characteristic |
The columnar joints are hexagonal volcanic rocks. 400 million years sedimentary rocks | 8 km long coastal columnar basalts | Various basalt landscapes and interactions with island culture |