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Identity HelpSmoky Quartzsite with Inclusions?
12th Dec 2018 21:05 UTCRobert Darabos
Any idea what the marks could be? It is not magnetic.
How would you describe the specimen?
I thought a Smoky Quartzsite with Iron/Hematite Inclusions
13th Dec 2018 01:06 UTCPaul Brandes 🌟 Manager
13th Dec 2018 07:07 UTCGregg Little 🌟
I suppose pure white quartzite is rare in continental sense but you should check out the hills/mountains of pure white quartzite on Manitoulin Island and adjacent Killarney Provincial Park in Ontario, Canada. In this local it is anything but rare being 1000's of feet thick. It is part of the Lorraine Formation and was deposited on the coastal region of proto-continent, now the Canadian Shield, soon after the earth's atmosphere rapidly became oxygenated around 2.2(?) billion years ago. Walking around a bare, bright white outcrop is blinding on sunny days.
14th Dec 2018 03:54 UTCPaul Brandes 🌟 Manager
14th Dec 2018 18:24 UTCDonald B Peck Expert
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Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 17:40:31