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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="Lefty" data-source="post: 419490" data-attributes="member: 2976"><p>No worries mate.</p><p></p><p>As Goldirocks has previously mentioned, it's quite common for one area of volcanic geology to be heavily dominated by one particular type of volcanics while still containing a smattering of little patches of different types.</p><p></p><p>I've been in a number of areas marked as felsic volcanics (high-silica lavas including rhyolite) on the geo map and come across tiny little areas that appear a completely different kind ie, mafic (high iron and magnesium) lavas. </p><p></p><p>Basalt is mafic - I guess the reverse might be possible and there may be little patches of felsic stuff in the same area dominated by mafics?</p></blockquote><p></p>
[QUOTE="Lefty, post: 419490, member: 2976"] No worries mate. As Goldirocks has previously mentioned, it's quite common for one area of volcanic geology to be heavily dominated by one particular type of volcanics while still containing a smattering of little patches of different types. I've been in a number of areas marked as felsic volcanics (high-silica lavas including rhyolite) on the geo map and come across tiny little areas that appear a completely different kind ie, mafic (high iron and magnesium) lavas. Basalt is mafic - I guess the reverse might be possible and there may be little patches of felsic stuff in the same area dominated by mafics? [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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