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felsic

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felsic
felsic, a. Min. (ˈfɛlsɪk) [f. feldspar + lenad (= feldspathoid) + silica + -ic.] Of or pertaining to such light-coloured minerals as the feldspars, the feldspathoids, quartz, and muscovite, or to rocks containing a high proportion of these or similar minerals.1912 W. Cross et al. in Jrnl. Geol. XX. ... Oxford English Dictionary
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Cupola (geology)
Cupola-type magma chambers might form above larger basaltic magma bodies and differentiate to create intermediate or felsic magmas, which in turn may reach the surface to produce small eruptions of intermediate or felsic lava. wikipedia.org
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Archean felsic volcanic rocks
Archean felsic volcanic rocks are felsic volcanic rocks that were formed in the Archean Eon (4 to 2.5 billion years ago). Felsic volcanic rocks also include felsic tuff that was formed when tephra was consolidated. wikipedia.org
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mafic
mafic, a. Min. (ˈmæfɪk) [f. magnesium + L. f-errum iron + -ic.] Pertaining to, containing, or designating the dark-coloured minerals of igneous rocks, which are predominantly ferromagnesian in character. Opp. felsic a.1912 W. Cross et al. in Jrnl. Geol. XX. 561 We suggest the term..mafic for the gro... Oxford English Dictionary
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Roosevelt Gabbros
At these contacts more intermediate to felsic rocks such as quartz gabbro and granodiorite are found. Similarly to the Sandy Creek Gabbro, the Mount Sheridan Gabbro becomes more felsic upwards through the member. wikipedia.org
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Acidic rock
available, especially during the fieldwork, classification based on the mineral (modal) composition is more often used (dividing the igneous rocks into felsic See also Felsic rock References External links Igneous Rocks Petrology wikipedia.org
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Ammonoosuc Volcanics
The Bronson Hill Arc is made up of both volcanic and plutonic sequences of felsic and mafic rocks, whose ages range from the Cambrian into the Lower Devonian The rocks are mostly mafic, but there is plenty of felsic material as well. wikipedia.org
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(PDF) Felsic dykes in the metallogenic area of southern ... - ResearchGate
湘南钨锡 多金属矿集区位 于南岭海 西期凹 陷带的 东段， 矿床（ 点） 主要集中 在郴 州市， 以及 汝城 和宜章 等县境 内， 在 矿集 区约 1 1 0 0 0 k m
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The Devastator Assemblage
It consists of subvolcanic intrusions of a partly preserved volcanic vent and felsic volcanic rocks that were erupted from the vent. The eastern portion of The Devastator Assemblage comprises the partly preserved vent and felsic volcanic rocks while the western portion consists of crudely wikipedia.org
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ألبيت
لمعدن الألبيت الصيغة NaAlSi3O8، وهو بذلك من تيكتوسيليكات، وهو مكون شائع في الصخور الفلسية Felsic. wikipedia.org
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长英质
"长英质"（felsic）在地质学中是指主要由轻的元素如硅, 氧, 铝, 钠, 钾组成的硅酸盐矿物, 岩浆, 与岩石。其颜色较浅，比重小于3. 最常见的长英质岩石是花岗岩,此外还有富钠的斜长岩， 矿物则有石英, 白云母, 正长石、富钠的长石等. 对于长英质变质岩又没有确定的火山原岩，可以称之为"长英质片岩"(felsic schist). 有这样的例子，把高度剪切的花岗岩错误地当作流纹岩。 全晶质长英质岩石应该使用QAPF图，根据花岗岩命名法取名。 岩石纹理确定了长英质岩石的基本名字。 wikipedia.org
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Cryptocrystalline
Volcanic rocks, especially of the felsic type such as felsites and rhyolites, may have a cryptocrystalline groundmass as distinguished from pure obsidian (felsic) or tachylyte (mafic), which are natural rock glasses. wikipedia.org
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Southern Oklahoma Aulacogen
Felsic rocks The felsic rocks of the Southern Oklahoma aulacogen are broken into two main units, the Carlton Rhyolite Group and the Wichita Granite Group This suggests that the parent magma of the Carlton Rhyolite was a high-temperature felsic lava. wikipedia.org
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火山碎屑
火山灰主要为流纹岩，在构成里因为多数易爆的火山是更黏的felsic或高的硅土岩浆的产品。火山碎屑的发行跟随爆发通常介入最大的冰砾下落对地面最快和因此最紧密对出气孔，当更小的片段旅行进一步灰可能经常旅行为数以万计英哩当它可能停留在统温层几个星期。 wikipedia.org
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Big Dan Shear Zone
Geology The Big Dan Shear Zone was contemporaneous to volcanism due to the higher density of felsic dikes situated at the shear zone. This phase of tectonic activity along the Big Dan Shear Zone also displaced felsic dikes north of the shear zone. wikipedia.org
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