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2. Igneous textures - Wikipedia

   en.wikipedia.org/wiki/Igneous_textures

   The individual crystals in an aphanitic igneous rock are not distinguishable to the naked eye. Examples of aphanitic igneous rock include basalt, andesite, and rhyolite. Glassy or vitreous textures occur during some volcanic eruptions when the lava is quenched so rapidly that crystallization cannot occur. The result is a natural amorphous glass ...

3. Llanite - Wikipedia

   en.wikipedia.org/wiki/Llanite

   Llanite is a porphyritic rhyolite with distinctive phenocrysts of blue quartz (a rare quartz color) and perthitic feldspar (light grayish-orangeish). The brown, fine-grained groundmass consists of very small quartz, feldspar, and biotite mica crystals.

4. Acidic rock - Wikipedia

   en.wikipedia.org/wiki/Acidic_Rock

   Typical acidic rocks are granite or rhyolite. The term is used in chemical classification of igneous rock based on the content of silica (SiO 2 ). Due to the fact that chemical analyzes are not always available, especially during the fieldwork, classification based on the mineral (modal) composition is more often used (dividing the igneous ...

5. Rhyolite - Wikipedia

   en.wikipedia.org/wiki/Rhyolite

   Rhyolite was mined there starting 11,500 years ago. [32] Tons of rhyolite were traded across the Delmarva Peninsula, [32] because the rhyolite kept a sharp point when knapped and was used to make spear points and arrowheads. [33] Obsidian is usually of rhyolitic composition, and it has been used for tools since prehistoric times. [34]

6. The 10 best-selling lipsticks of all time - AOL

   www.aol.com/lifestyle/2016-02-29-the-10-best...

   The debuts of Christian Louboutin's first lipstick line and Kylie Jenner's Lip Kit has lipstick on all of our minds. And for good reason -- the makeup essential can really transform your look.

7. Glossary of geology - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_geology

   Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...