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Showing results for tags 'quartzite'.
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I keep finding samples of this rock - which I believe is quartzite because it's hard and crystaline (always fractures along facets) My guess is that the rock was sedimentary to begin with. Many samples I find have back spherical things in them about 1 cm in size. There is some small indication of radial spikes and some appear to have a halo around the perimeter. If they are fossils and not simply geological they might be Ediacaran. These are being found along the shore of the British Columbia mainland north of Vancouver.IMG_0968.CR2 of British Columbia mainland just north of Vancouver, B.C.
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I was recently in Park City, Utah, when I collected a few rocks from the dump of the old Thaynes Mine. I thought it was Quartzite at first, but then I did some research on the stratigraphy of the Park City District and began to doubt my assessment. From highest to lowest, the formations of the district are the Ankareh Shale, the Thaynes Limestone, the Woodside Shale, the Park City Limestone, and the Weber Quartzite. I am not certain of this, but I do not think the Thaynes Mine ever entered the Weber Quartzite. However, I did discover that the Park City Limestone contains some Quartzite inclusions, but I'm not sure if the mine even went that deep. Overall, I think that it is either Sandstone of Quartzite, but I'm not sure which, nor am I sure of the parent formation. Any input on this matter would be greatly appreciated. The specimen is a light bluish-grey, hard, fine grained, and has small pockets of carbonate residue in it.