Home Page - YouTube Channel



Mafic - Simple English Wikipedia, the free encyclopedia

Mafic

From the Simple English Wikipedia, the free encyclopedia that anyone can change

Mafic minerals are usually dark in color and have a specific gravity greater than 3.

Common rock-forming mafic minerals include olivine, pyroxene, amphibole, biotite and other micas, augite and the calcium-rich plagioclase feldspars. Common mafic rocks include basalt and gabbro.

In terms of chemistry, mafic rocks are on the other side of the rock spectrum from the so-called felsic rocks. The term roughly corresponds to the older basic rock class.

Mafic lava, before cooling, has a lower viscosity than felsic lava due to its lower silica content. Water and other volatiles can more easily and gradually escape from mafic lava, so eruptions of volcanoes made of mafic lavas are less explosively violent than felsic lava eruptions. Most mafic lava volcanoes are oceanic volcanoes, like Hawaii.


Rock Texture Name of Mafic Rock
Pegmatitic Gabbro pegmatite
Coarse grained (phaneritic) Gabbro
Coarse grained and porphyritic Porphyritic gabbro
Fine grained (aphanitic) Basalt
Fine grained and porphyritic Porphyritic basalt
Pyroclastic Basalt tuff or breccia
Vesicular Vesicular basalt
Amygdaloidal Amygdaloidal basalt
Many small vesicles Scoria
Glassy Tachylyte, sideromelane, palagonite

[change] See also

Wikipedia HTML 2008 in other languages

100 000 +

Česká (Czech)  •  English  •  Deutsch (German)  •  日本語 (Japanese)  •  Français (French)  •  Polski (Polish)  •  Suomi (Finnish)  •  Svenska (Swedish)  •  Nederlands (Dutch)  •  Español (Spanish)  •  Italiano (Italian)  •  Norsk (Norwegian Bokmål)  •  Português (Portuguese)  •  Română (Romanian)  •  Русский (Russian)  •  Türkçe (Turkish)  •  Українська (Ukrainian)  •  中文 (Chinese)

10 000 +

العربية (Arabic)  •  Български (Bulgarian)  •  Bosanski (Bosnian)  •  Català (Catalan)  •  Cymraeg (Welsh)  •  Dansk (Danish)  •  Ελληνικά (Greek)  •  Esperanto  •  Eesti (Estonian)  •  Euskara (Basque)  •  Galego (Galician)  •  עברית (Hebrew)  •  हिन्दी (Hindi)  •  Hrvatski (Croatian)  •  Magyar (Hungarian)  •  Ido  •  Bahasa Indonesia (Indonesian)  •  Íslenska (Icelandic)  •  Basa Jawa (Javanese)  •  한국어 (Korean)  •  Latina (Latin)  •  Lëtzebuergesch (Luxembourgish)  •  Lietuvių (Lithuanian)  •  Latviešu (Latvian)  •  Bahasa Melayu (Malay)  •  Plattdüütsch (Low Saxon)  •  Norsk (Norwegian Nynorsk)  •  فارسی (Persian)  •  Sicilianu (Sicilian)  •  Slovenčina (Slovak)  •  Slovenščina (Slovenian)  •  Српски (Serbian)  •  Basa Sunda (Sundanese)  •  தமிழ் (Tamil)  •  ไทย (Thai)  •  Tiếng Việt (Vietnamese)

1 000 +

Afrikaans  •  Asturianu (Asturian)  •  Беларуская (Belarusian)  •  Kaszëbsczi (Kashubian)  •  Frysk (Western Frisian)  •  Gaeilge (Irish)  •  Interlingua  •  Kurdî (Kurdish)  •  Kernewek (Cornish)  •  Māori  •  Bân-lâm-gú (Southern Min)  •  Occitan  •  संस्कृत (Sanskrit)  •  Scots  •  Tatarça (Tatar)  •  اردو (Urdu) Walon (Walloon)  •  יידיש (Yiddish)  •  古文/文言文 (Classical Chinese)

100 +

Nehiyaw (Cree)  •  словѣньскъ (Old Church Slavonic)  •  gutisk (Gothic)  •  ລາວ (Laos)