Category:Brisbane tuff of Kangaroo Point, Queensland
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Brisbane tuff was formed by the welding and compaction of volcanic ash more than 226 million years ago. It displays pyroclastic flows of rock fragments deposited as the volcanic ash was forming. Layers of Brisbane tuff can be over 50m thick. It is a form of welded ignimbrite.
Brisbane tuff comes in a variety of colours: pink, green, blue (grey) and purple. The different colours are due to the extent of oxidation of iron and manganese.
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Media in category "Brisbane tuff of Kangaroo Point, Queensland"
The following 3 files are in this category, out of 3 total.
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Imbrignite tuff joints weeping Main St Kangaroo Point P1030028.jpg 4,000 × 3,000; 13.42 MB
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