Andesite is a type of rock usually found in Volcanoes above the convergent plate boundary between continental and oceanic plates.

Where will you find andesite magma?

Granitic or rhyolite magmas and andesite magmas are produced in Convergent plate boundaries of the marine lithosphere (Earth’s outer layer consisting of the crust and upper mantle) subduction so that its edge lies below the edge of a continental plate or another oceanic plate.

In what type of rock is andesite found?

Andesite most often denotes fine-grained, usually porphyry rocks; compositionally, these correspond roughly to intrusive igneous diorite And is mainly composed of feldspar (a type of plagioclase) and one or more iron-magnesium minerals such as pyroxene or biotite.

How to identify andesite?

Andesite is the fine-grained equivalent of diorite. It tends to be darker grey than rhyolite and is usually porphyritic with visible amphibole. Basalt occurs in the form of thin to abundant lava.

What is andesite used for?

It’s fairly sturdy and can be used for road and rail construction, and as filler gravel. The grey rock between the railway ties is usually andesite or its close relative basalt. Perhaps the most interesting use of andesite is as evidence of volcanic activity on Mars.

Pyrogenic Lab: Andesite

29 related questions found

What are the 4 types of igneous rocks?

Classification by mineral abundance

Igneous rocks can be divided into four categories according to their chemical composition: felsic, medium, mafic and ultramafic.

How hard is andesite?

The Mohs hardness of andesite is 7.

Where can I identify rocks?

Can you identify my rocks or minerals?

• Your State Geological Survey.
• Museum of Natural Science.
• A college or university with a department of geology.
• A rock shop.
• Member of a local Gem & Mineral club or Rockhunting club (many hobbyists are experts in identification)
• Suppliers at the Gem & Mineral Show.

How to tell if a rock has layers?

Layers: Layers in rocks are displayed in different ways.in some rocks Minerals of different colors arranged in ribbons.. usually come in two colors, usually black and white, or green and white, black and tan or pink. Banded layers are found in rock gneiss.

What type of rock is eclogite?

eclogite, any member of a small group Igneous and metamorphic rocks Its composition is similar to basalt. Eclogite is mainly composed of green pyroxene (ommite) and red garnet (pyrite), with small amounts of various other stable minerals such as rutile.

Is diorite porphyritic?

Diorite has a long crystalline, often speckled, coarse-grained texture and is occasionally patchy…Diorite may be related to granite or gabbro intrusions into which they may be subtly fused. Diorite is the result of partial melting of mafic rocks above subduction zones.

Is andesite magma explosive?

Andesite magma is usually ejected from stratovolcanoes in thick lava flows, some kilometers long.Andesite magma can also generate powerful explosive eruption Pyroclastic flows and surges and giant eruption columns form. Andesite erupts at temperatures between 900 and 1100°C.

What are the 3 types of magma?

It also contains small amounts of dissolved gases such as water vapor, carbon dioxide and sulfur. The high temperatures and pressures under the Earth’s crust keep the magma flowing. There are three basic types of magma: Basalt, andesite and rhyoliteeach with a different mineral composition.

Why does rhyolite magma explode?

DACITIC to Rhyolite

The viscosity of these felsic lava increases correspondingly with increased silica (SiO2) content and increased polymerization. …these explosive eruptions are The role of high viscosity and high gas content in dacite and rhyolite magmas.

Is Quartz Stone Worth?

The clarity of quartz makes its original price about $0.01/ct Stone prices range from $1-7 per carat. Amethyst or purple quartz are the most valuable varieties (up to $15/carat), but pink, rose and smoky quartz are also valuable. Clearer, more vibrant and complete specimens are the most valuable quartz.

How to tell if a stone is rare?

Hike through the woods or walk along the beach, and you may come across an unusual rock, and – if it’s your lucky day – the rock may be of great value. To determine if it has monetary value, Test it for color and hardnessand check it for surface markings that could possibly identify it as a meteorite.

Is there an app that recognizes rocks?

Rock identification just got easier Rock Recognition App. Just take or upload a picture of your rock and the rock identifier will help you identify it in seconds. Start exploring, learning and documenting your geological environment with Rock Identifier!

What is the best rock identification app?

best rock identification app

• Geology Toolkit. …
• Rock Identifier Stone finder. …
• Mineral Guide: Rocks, Crystals and Gems. …
• Geological Rocks – A Handbook of Rocks. …
• rock music.

What does metamorphic rock look like?

Metamorphic rocks were once igneous or sedimentary rocks but have changed (metamorphic) due to high temperature and/or pressure within the Earth’s crust.They are crystalline and often have « Squashed » (leaf or ribbon) texture.

Does obsidian exist?

Obsidian, igneous rock as Natural glass formed by rapid cooling of volcanic lava. Obsidian is rich in silica (approximately 65% ​​to 80%), has a low water content, and is chemically similar to rhyolite. Obsidian has a glass-like luster and is slightly harder than window glass.

Is andesite volcanic or deep?

Andesite.Andesite is a Volcanic rock (= extrusive igneous rock) Rocks with moderate to high silica content. It is the eruptive equivalent of diorite, and if it erupted, the magma that produced the diorite would turn into andesite.