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Vesicles in Meteorites

Vesicles and metal together in the same "rock" are a good field mark for slag. Terrestrial Rocks with Vesicles. Basalts are the rocks that form when volcanic lava or magma cools. Not all basalts are vesicular, but vesicular basalts are very common on Earth.

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21. Vesicular Volcanic Rock, Hawaii

21. Vesicular Volcanic Rock, Hawaii . Pits or vesicles in volcanic rocks are caused by exsolved volatiles emerging as gas bubbles on eruption. The vesicles seen here are in lavas erupted from Mauna Ulu Volcano in 1969. A camera lens cap provides the scale. Photograph courtesy of P. Mouginis-Mark.

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Pumice - Igneous Rocks

Pumice is typically light-colored and very vesicular. This rock is a trap to volcanic gases that tried to escape from magma but were unable to do it because they simply could not break out and formed many gas-filled vesicules instead. Trapped gases occupy much larger volume than they did when dissolved in magma. Hence, it is perhaps needless to ...

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Vesicle | igneous rock | Britannica

extrusive igneous rocks. In igneous rock: Small-scale structural features Such openings are called vesicles, and the rocks in which they occur are said to be vesicular. Where the openings lie close together and form a large part of the containing rock, they impart .

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Vesicular and Amygdaloidal Textures

Vesicles are fossil bubbles. So, a rock that looks like Swiss cheese has a vesicular texture. Vesicles range in shape from spherical to elongated and in size from ~1mm to more than 1 cm. Basalts are most commonly vesicular. The drop in pressure that a magma experiences as it flows from underground ...

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Phsysical Geology, Igneous Rocks - Union College

Scoria Broken pieces of vesicular volcanic rock, in this case a basalt. The crystals are too small to identify so the basalt rock type is inferred from its dark color on broken surfaces. The reddish color is caused by high-temperature oxidation iron in the lava to hematite, it flew through the air.

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Introduction & Textures & Structures of Igneous Rocks

Magma can cool to form an igneous rock either on the surface of the Earth - in which case it produces a volcanic or extrusive igneous rock, or beneath the surface of the Earth, - in which case it produces a plutonic or intrusive igneous rock. ... result in a low density highly vesicular rock fragment called pumice.

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Igneous Rocks Flashcards | Quizlet

A _____ is an open cavity in a volcanic rock that was filled by a gas bubble when the lava was still mainly liquid Vesicle Why would a plume of solid silicate rock rising slowly from deep in the mantle begin melting as it neared the abse of the lithosphere

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Igneous Rock Textures - ThoughtCo

Jan 31, 2019 · There are nine main types of igneous rock textures: Phaneritic, vesicular, aphanitic, porphyritic, poikilitic, glassy, pyroclastic, equigranular, and spinifex. Each kind of texture has a variety of different characteristics that make them unique.

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Obsidian - Igneous Rocks

Vesicular basaltic volcanic glass from Punalu'u Beach, Hawaii. Width of view 20 mm. Obsidian with gray layers of rhyolitic pumice in Long Valley Caldera in California. Pumice and rhyolite have very similar composition but they differ in texture — pumice is highly vesicular while obsidian is massive.

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Types of volcanic rocks, lava, and deposits | Lucky Sci

Aug 25, 2014 · Volcanic rocks are extrusive igneous rocks. There are two main groups: rocks that form from the solidification of lava flows (extrusive), and rocks that form from the compaction of solid volcanic fragments (pyroclastic). This post will cover the basics in easy-to-grasp bullet-point style that facilitates comparison between volcanic rocks.

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How does a vesicular texture in a volcanic ... - Answers

Volcanic rocks with gas bubbles are called vesicular. This, however, is a descriptive term rather than an actual rock types. Some vesicular volcanic rocks include pumice, scoria, and vesicular basalt.

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What are volcanic rocks? / VolcanoDiscovery

Intermediate volcanic rocks include andesite, dacite, and latite. Volcanic rocks often have a vesicular texture, which is the result voids left by volatiles escaping from the molten lava. Pumice is a rock, which is an example of explosive volcanic eruption. It is so vesicular that it floats in water.

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Vesicular | Definition of Vesicular at Dictionary

Vesicular definition, of or relating to a vesicle or vesicles. See more.

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Vesicular texture - Wikipedia

Vesicular texture is a volcanic rock texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside. This texture is common in aphanitic, or glassy, igneous rocks that have come to the surface of the earth, a process known as extrusion. As magma rises to the surface the pressure on it decreases.

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Igneous Rocks | Geology

Felsic igneous rocks, as a whole rock, tend to have light colors or shades: white, pink, light brown, light gray. Mafic igneous rocks, on the whole, tend to be dark colored, commonly black or dark gray. Most mafic magma originates by melting of rocks in the mantle that are extremely rich in iron and magnesium.

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Pumice - Igneous Rocks

Pumice is typically light-colored and very vesicular. This rock is a trap to volcanic gases that tried to escape from magma but were unable to do it because they simply could not break out and formed many gas-filled vesicules instead. Trapped gases occupy much larger volume than they did when dissolved in magma. Hence, it is perhaps needless to ...

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Volcanic Minerals - Oregon State University

Volcanic Minerals . Can your knowledge of volcanic rocks make you rich? Yes!! That is, if you combine it with knowledge of mineral deposits and global economic factors. Volcanoes directly or indirectly produce or host deposits of aluminum, diamonds, gold, nickel, lead, zinc, and copper.

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Igneous Rock Textures - indiana.edu

Thus, we have a glass (no ordering like in minerals) and the rock breaks like glass does, with a conchoidal fracture. E) PYROCLASTIC TEXTURE (VOLCANIC ASH AND TUFF DEPOSITS) Handspecimens of a rhyolite breccia and a rhyolite tuff. Both are volcanic rocks of granitic composition, that formed due to explosive volcanism.

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Pumice - Wikipedia

Pumice (/ ˈ p ʌ m ɪ s /), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. It is typically light colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls and being dark colored and denser.

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