Igneous Rock

obsidian

* Vesicular rock texture is generally displayed in extrusive igneous rocks which contain many vesicles of trapped air, such as pumice or scoria.

* Igneous rocks containing holes which were produced as gases escaped from the upper part of lava flow.

Not all lava rock is pumice. Lava rock is a term used synonymously with pumice by some material suppliers. Actually though, any rock formed from cooling lava would be considered a 'lava' rock and would include rocks like pumice, obsidian, and basalt. Only lava has a density less than that of water, allowing it to float.

kg

it is called a 'dike'

Granite is an igneous intrusive rock (crystallized at depth), with felsic composition (rich in silica and predominately quartz plus potassium-rich feldspar plus sodium-rich plagioclase) and phaneritic, subeuhedral texture.

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There was a young fellow named Tim,

Who had never learned how to swim,

He fell off a Dock,

Sunk like an igneous rock,

And that was the end of him.

Igneous rock is typically rigid and strong due to the interlocking nature of its mineral crystals. However, its brittleness can vary depending on factors such as mineral composition, texture, and cooling rate during formation. In general, igneous rock can fracture along existing planes but can also deform plastically under high pressure and temperature conditions.

Granite is a heterogenoues mixture. Brass is homogeneous.

nothing

we can call it an igneous rock because it coming from partial melting of preexisting rocks

People have used igneous rock for tools because of its strength and workability; for building materials due to its beauty, strength and availability.

Because sedimentery rock is formed under the sea, sediment collects at the bottom of the ocean, and so does a few dead sea creatures, then t gets squashed by other sediment, igneous rock is formed by lava cooling, so there is no fossils in it.

Dehydration in geological terms is a process which occures during metamorphosis. As a rock moves to a higher pressure and temprature, say as it is traveling down a subduction zone the water will gradually be taken out of it. The deeper the rock travels, the more dehydrated it becomes untill eventually there is no water left in it and it is compleatly dry.

No. Any rock at the surface can be eroded, deposited as sediment, and then lithified into sedimentary rock. Most rock that melts into magma goes through a metamorphic phases first, however.

Granite and diorite contain both.

No. Gritstone is sedimentary.

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Because ingenious rock is a type of rock, sedimentary hardens over time with the sediment(gravel, rocks, dirt) inside it. So in this case the fossils or dinosaur bones harden over time into the sediment and form into the rock.

Magma inside Earth is under a lot of pressure, so it will tend to flow toward the lower pressure at the surface. Additionally, gasses dissolved in the magma bubble out of the magma as it approaches the surface, like bubbles from a freshly opened can of soda. As the gases expand they forces some of the molten rock out of the volcanic vent.

The value of smoky quartz will vary with the color. Medium smokey quartz is valued at approximately $38 per carat. Lighter and darker shades will be worth less.

Coarse crystals are found in intrusive rocks because these rocks form from magma that cools and solidifies slowly beneath the Earth's surface. The prolonged cooling period allows individual mineral crystals ample time to grow larger, resulting in the coarse texture characteristic of intrusive igneous rocks, such as granite. In contrast, extrusive rocks cool quickly on the surface, leading to finer-grained textures.