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Chert, mudstone, shale, slate, precipitated limestone.
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What are some examples of a fine-grained rock?
Examples of fine-grained rocks include shale, mudstone, siltstone, and some varieties of basalt. These rocks have small mineral grains that are not easily visible to the naked eye and typically form in environments with slow cooling or deposition rates.
Why is the void ratio of a fine grained soil greater than that of coarse grained soil?
In fine grained soil very fine particle are there which has got some chemical repulsion, these chemical repulsion does not allow particle to come closer due to which void ratio of fine grained soil is higher than coarse grained soil.
What are some examples of igneous rocks?
Igneous rocks are generally classified first on the basis of their formation (and therefore their texture) as intrusive or extrusive. Intrusive rocks are solidified from magma under the surface resulting in a visible crystalline texture, and extrusive igneous rocks are solidified from lava at or near the surface, resulting in a small or nearly invisible crystalline texture.Igneous rock can additionally be classified by general chemistry composition as felsic, intermediate, mafic, and ultramafic. Felsic rocks are higher in silica and aluminum. Maficrocks are higher in magnesium and iron.Examples of igneous rock include:pumicebasaltandesitewehrlitemonzoniteanorthositewelded tuffnepheline syeniteaplitewebsteritekimberlitegabbrodioritegranitebasanitetroctolitepegmatitediabasepicritelatitegranodioritetonaliteperidotiteignimbritehornblenditelampophyrephonolitedunitesyenitetachylytemonzogranitetephritegranophyreboniniterhyodacitetrachytecarbonatiteharzburgiteicelanditepyroxenitetrachyandesitefoidoliterhyoliteobsidianscoriaWords used to describe igneous rock or igneous rock typesinclude: ultramafic, mafic, intermediate, felsic, aphanitic, porphyritic, phaneritic, extrusive, intrusive, vesicular, glassy, coarse grained, fine grained, acidic, basic.
Is metamorphic rock rough or smooth?
Metamorphic rock can vary in texture, with some being rough due to the presence of mineral grains and others being smooth due to recrystallization of minerals during the metamorphic process. The texture of metamorphic rock depends on factors such as the original rock type and the intensity of heat and pressure.
What do geologists observe when looking at a rock's texture?
Geologists observe the size, shape, and arrangement of mineral grains in a rock's texture. This helps them infer how the rock formed and what processes it has undergone. Textures can range from fine-grained (small grains) to coarse-grained (large grains) and can provide valuable information about the rock's history.
Which igneous rocks are coarse grained due to slow cooling?
All molten rock is capable of cooling quickly into fine-grained rocks, but here are some common fine-grained igneous rocks: Basalt Obsidian Andesite Rhyolite Tuff (a rock made from volcanic ash)
What is Grain size of metamorphic rock?
It varies some metamorphic rocks are fine grained (eg slate) and others have very large crystals (eg an augen gneiss).
Is felsic porphyritic extrusive?
Felsic porphyritic rocks can be extrusive if they are formed from volcanic eruptions. These rocks have a high silica content and typically contain large crystals (phenocrysts) embedded in a fine-grained matrix. Examples of felsic porphyritic extrusive rocks include rhyolite and dacite.
What does igneous rock looks like?
Igneous rocks can have a variety of appearances. They can be glassy (obsidian), fine-grained (basalt), or coarse-grained (granite). Igneous rocks often exhibit interlocking crystals in various colors, depending on the mineral composition.
What are some changes that occur when a sedimentary rock transforms into a metamorphic rock?
The process of metamorphism is one that changes or alters either the mineralogy or the texture, but typically both, of some pre-existing rock. Slate, marble and quartz are examples of metamorphism.
Is basalt a porous rock?
Yes, basalt is generally considered a dense and non-porous rock due to its fine-grained texture and low porosity. However, there can be variations in porosity depending on factors such as vesicles or fractures within the basalt.
What are examples of Weathered rock?
Some examples of weathered rock inculde the Grand Canyon and Devil's tower.
