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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="user 4386" data-source="post: 401146" data-attributes="member: 4386"><p>Very common - the intermittent but continuous volcanics in central Victoria over the last 30 million years are usually shown in one colour or two, yet represent a score of events of different age, or different compositions of the same age in different areas, varying from trachyte (eg Hanging Rock area) to basalt plains south of Ballarat, to scoria cones only 200,000 years old rising from those few million year old lava plains. The last eruption here was 3000 years ago, recorded in aboriginal legend, and has not actually ceased (molten lava still under Bass Strait ready to erupt any time). Different events have a different tendency to produce gemstones.</p></blockquote><p></p>
[QUOTE="user 4386, post: 401146, member: 4386"] Very common - the intermittent but continuous volcanics in central Victoria over the last 30 million years are usually shown in one colour or two, yet represent a score of events of different age, or different compositions of the same age in different areas, varying from trachyte (eg Hanging Rock area) to basalt plains south of Ballarat, to scoria cones only 200,000 years old rising from those few million year old lava plains. The last eruption here was 3000 years ago, recorded in aboriginal legend, and has not actually ceased (molten lava still under Bass Strait ready to erupt any time). Different events have a different tendency to produce gemstones. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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