File:"Tan Brown Granite" (porphyritic granite, Archean; Andhra Pradesh State, southern India) (14618910269).jpg
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"Tan Brown Granite" - porphyritic granite from the Precambrian of India. "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. Tan Brown Granite is an Archean porphyritic granite from Andhra Pradesh State in southern India. This is one of a large number igneous & metamorphic decorative stones produced in India. Many come from the Eastern Ghats Orogenic Belt, an ancient mountain belt running along the eastern margin of Peninsula India. This rock is distinctive in having bluish-gray quartz crystals and large brownish-salmon colored K-feldspar crystals with obvious internal exsolution lamellae and internal disruptions. |
| Date | |
| Source | "Tan Brown Granite" (porphyritic granite, Archean; Andhra Pradesh State, southern India) |
| 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@N05/14618910269 (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 | | 1,090 × 1,120 (256 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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