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Mcnair, B.

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Phaneritic texture on a granite rock
Home » Archives for Mcnair, B.

What Is a Phaneritic Texture and Which Rocks Have It?

The phaneritic texture is one of the igneous rock textures. It describes rocks with large crystals visible to the naked eye, i.e., you can see

Categories Igneous
Porphyritic diabase (dolerite)
Home » Archives for Mcnair, B.

What is a Porphyritic Texture and How Is It Formed?

Porphyritic texture describes an igneous rock texture with large crystals embedded in a finer-grained matrix. It can occur in virtually all igneous rocks, i.e., intrusive

Categories Igneous
Quartz porphyry rock
Home » Archives for Mcnair, B.

What Is Porphyry? How Does It Form, and In Which Rocks?

Porphyry (pronounced as POR-fə-ree) describes any intrusive or extrusive igneous texture rock with large-grained crystals embedded in a finer-grain matrix. The finer-grained groundmass or matrix

Categories Igneous
Granite Porphyry or Porphyritic Granite Rocks
Home » Archives for Mcnair, B.

Here Is Everything to Know about Porphyritic Granite Rocks

Granite porphyry describes granite rocks with large crystals in a finer-grained matrix but with the same mineralogy and chemistry as ordinary granite rocks. So, porphyry

Categories Igneous
Porphyritic basalt or Basalt porphyry
Home » Archives for Mcnair, B.

Easiest Explanation of What Porphyritic Basalt Texture Is

Porphyritic basalt or basalt porphyry describes basalt rocks with large crystals known as phenocrysts dispersed in a fine-grain matrix or groundmass. So, the word porphyry

Categories Igneous
Porphyritic rhyolite or ryolite porphyry
Home » Archives for Mcnair, B.

Uncover More on Porphyritic Rhyolite Texture

We use the rhyolite porphyry or porphyritic rhyolite term to indicate that the rhyolite rocks have larger crystals set in a fine-grained glassy matrix. Remember

Categories Igneous
Andesite porphyry (porphyritic andesite)
Home » Archives for Mcnair, B.

All You Should Know Porphyritic Andesite Texture

Andesite porphyry or porphyritic andesite rocks are andesite rocks with large crystals set inside a finer-grained matrix. The larger, visible crystals are phenocrysts and the

Categories Igneous
Poikilitic texture - A large augite surrounding a plagioclase mineral crystal
Home » Archives for Mcnair, B.

What Are Ophitic, Subophitic and Poikilitic Textures

Poicilitic or poikilitic texture is one of the igneous rock textures. It is characterized by a few larger, poorly-formed mineral crystals, completely enclosing many smaller, well-formed,

Categories Igneous
The 10 minerals in Mohs hardness scale kit
Home » Archives for Mcnair, B.

What Is Mohs Hardness Scale and How Does It Work?

What is the Mohs Hardness Scale? Why Is it important, and how does it work? We have an insight into all these, including how to

Categories Mineralogy
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