File:"Crystal Gold Granite" (porphyritic granite, English River Subprovince intrusion, 2.66-2.71 Ga, Neoarchean; Second Mountain Quarry, western Ontario, Canada) (14803135864).jpg
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"Crystal Gold Granite" - porphyritic granite from the Precambrian of Ontario, Canada, USA. "Granite" in the decorative stone trade is any relatively hard rock that will take a fine polish, regardless of mineralogy or chemistry or geologic origin. "Granites" turn out to be felsic to mafic intrusive igneous rocks (granite, granodiorite, porphyritic granite, rapakivi granite, orbicular granite, pegmatitic granite, graphic granite, anorthosite, monzonite, gabbro, norite, gabbronorite, dolerite, diabase, charnockite, etc.) and high-grade to very high-grade metamorphic rocks (metanorthosite, gneiss, metaconglomerate, amphibolite, quartzite, granulite, migmatite). True granites (= monzogranites & syenogranites & porphyritic varieties) make up most of the commercial granite trade. Countless varieties are quarried around the world. Crystal Gold Granite is a porphyritic granite with quartz, K-feldspar, plagioclase feldspar, and mafic mineral(s) from an English River Subprovince intrusion (Neoarchean, 2.66-2.71 Ga). This rock comes from the Second Mountain Quarry, ~3 to 4 km east of Forgotten Lake, north of Redditt, north of the Trans-Canada Highway, NNE of Kenora, western Ontario, southern Canada (~50º 03’ 42.95” North, ~94º 18’ 55” West). |
| Date | |
| Source | "Crystal Gold Granite" (porphyritic granite, English River Subprovince intrusion, 2.66-2.71 Ga, Neoarchean; Second Mountain Quarry, western Ontario, Canada) |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14803135864 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:44, 5 December 2019 | | 2,353 × 2,223 (1.97 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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