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Gemstones, Minerals & Fossils
Gemstones and Minerals
unknown find from slatey
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<blockquote data-quote="shivan" data-source="post: 288174" data-attributes="member: 194"><p>Interesting stuff.</p><p>It was my understanding that petrified wood is associated with volcanism more for the hydrothermal activity associated with them rather than the ash. So the water around the magma and associated with it, is super heated and more easily able to dissolve and absorb the silica and other minerals leaving the water super saturated with silica. </p><p>Where as fossils/petrified wood from non volcanic areas are preserved through other means, sometimes in oceans where chert was forming such as peanut wood, or from carbonates in a basin environment like out near lake keepit. Others in rivers or lakes that had rapid deposition to help with preservation of material followed by pressure from compaction, like you seem to find a bit of petrified wood around coal seams.</p><p></p><p>I find it all very fascinating 8)</p></blockquote><p></p>
[QUOTE="shivan, post: 288174, member: 194"] Interesting stuff. It was my understanding that petrified wood is associated with volcanism more for the hydrothermal activity associated with them rather than the ash. So the water around the magma and associated with it, is super heated and more easily able to dissolve and absorb the silica and other minerals leaving the water super saturated with silica. Where as fossils/petrified wood from non volcanic areas are preserved through other means, sometimes in oceans where chert was forming such as peanut wood, or from carbonates in a basin environment like out near lake keepit. Others in rivers or lakes that had rapid deposition to help with preservation of material followed by pressure from compaction, like you seem to find a bit of petrified wood around coal seams. I find it all very fascinating 8) [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
unknown find from slatey
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