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Keywords from Image Description:
SBasalt. en Sshaped columnar rhyolitic tuff in Hong Kong High Island Reservoir cut by younger dyke of lamprophyre Source of information about rhyolitic tuff is geopark gov hk htm own took this photo Frequenttraveller en Basalt Basalt Columnar rhyolites High Island Reservoir Rocks in Hong Kong Tuff Dikes volcanism in China Lamprophyre