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Owais Khattak
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I am a master in geology.
I am a master in geology.

107 followers
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Scoria
Scoria is extrusive igneous rock which is vesicular and is of dark colour. Colour ranges from black or grey to reddish brown. Composition of scoria is similar to basalt and can be that of andesite . Formation of scoria Scoria is formed of the explosive from...
Scoria
Scoria
geologylearn.blogspot.com
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Scoria
Scoria is extrusive igneous rock which is vesicular and is of dark colour. Colour ranges from black or grey to reddish brown. Composition of scoria is similar to basalt and can be that of andesite. Formation of scoria Scoria is formed of the explosive from ...
Scoria
Scoria
geologylearn.blogspot.com
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Rhyolite
Rhyolite is an igneous rock which comes in the class of felsic rocks. Rhyolite forms of the lava with high silica content so the lava is very viscous. If rhyolitic magma is rich in gases, it can erupt explosively which will solidify quickly forming pumice. ...
Rhyolite
Rhyolite
geologylearn.blogspot.com
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Pumice
Pumice is extremely porous igneous rock and is light coloured which is formed during the explosive volcanic eruptions. This rock is porous enough to float on water surface for its low weight then eventually sink when water logged. Composition  Pumice is oft...
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Obsidian
Obsidian is a volcanic rock that is formed by lava flow which solidifies so quickly that its atom do not have time to arrange themselves in a crystalline structural form.  Colour of obsidian Obsidian mainly forms of black colour however this colour is not t...
Obsidian
Obsidian
geologylearn.blogspot.com
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Basalt
Basalt is a fine grained volcanic igneous rock formed of plagioclase and pyroxene minerals. It is most commonly formed by lava flow and in sills and dykes. Basalt is similar to gabbro in composition but the difference lies in the grain size of the two rocks...
Basalt
Basalt
geologylearn.blogspot.com
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Andesite
Andesite is an extrusive igneous volcanic rock which is in between rhyolite and basalt. Texture of andesite is between aphanitic and porphyritic. Andesite lava is of moderate viscosity and forms thich lava flows and domes. Andesite is mainly composed of pla...
Andesite
Andesite
geologylearn.blogspot.com
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Pegmatite
Pegmatite are intrusive rocks with extreme coarse grained texture that are developed at the final stages of magma crystallization. As huge amount of time has been granted to pegmatite rocks so it has extremely large crystals and sometimes rare minerals are ...
Pegmatite
Pegmatite
geologylearn.blogspot.com
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