Search results
Results from the WOW.Com Content Network
The granite scam was a corruption scandal that occurred in Tamil Nadu, India. [1] It gained notoriety after former civil servant of Madurai Ubagarampillai Sagayam wrote a letter to the chief secretary of the State Industries Department [2] on 19 May 2012, reporting major violations by many granite quarries in the Madurai district, estimating a loss of more than sixteen thousand crore rupees ...
"Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.
Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous ...
I-type granites are a category of granites originating from igneous sources, first proposed by Chappell and White (1974). [1] They are recognized by a specific set of mineralogical, geochemical, textural, and isotopic characteristics that indicate, for example, magma hybridization in the deep crust. [ 2 ]
Oxide minerals in S-type granites will more commonly be ilmenite rather than magnetite. [1] [4] Accessory minerals in S-type granites commonly are associated with, or occur as inclusions, in biotite. For example, apatite occurs in S-type granites in greater modal abundance and as larger, discrete crystals than in the I-type granites. [1] [4]
This is followed by deposition of albite, lepidolite, gem tourmaline, beryl, spodumene, amblygonite, topaz, apatite, and fluorite, which may partially replace some of the minerals in the earlier zone. [5] The center of the pegmatite may have cavities lined with spectacular gemstone crystals. [20] Some pegmatites have more complex zoning.
A review that considered berberine’s effects on heart health found some studies supporting this claim, but due to the high risk of bias, the researchers recommended more clinical trials be ...
Due to continental drift, the India Plate split from Madagascar and collided with the Eurasian Plate resulting in the formation of the Himalayas.. The earliest phase of tectonic evolution was marked by the cooling and solidification of the upper crust of the earth's surface in the Archaean Era (prior to 2.5 billion years) which is represented by the exposure of gneisses and granites especially ...