Review of Short Phrases and Links|
This Review contains major "Basalt"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Basalt is an extrusive, mafic (contains a high amount of magnesium and iron) igneous rock.
- Basalt is an extrusive igneous rock that is low in silica content, dark in color, and comparatively rich in iron and magnesium.
- Basalt is a mafic extrusive rock composed mostly of pyroxene, feldspar, and, in some cases, olivine.
- Basalt is an extrusive igneous rock, sometimes porphyritic, and is often both fine-grained and dense.
- Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene.
- Use inert rocks such as sandstone, slate, granite and basalt for water conditions that are soft or low in p H.
- The parent rock is commonly siltstone or basalt, but may be other types of rock.
- Students should write the age of the volcanic ash beside the shale, siltstone and basalt on the list below the block diagram.
- Augite is often found as crystals in basalt.
- In contrast, fine-grained rocks, such as basalt, are igneous rocks that have crystals too fine to see with the naked eye.
- Rock having the same composition as basalt, but with larger crystals which are just visible to the unaided eye; also called traprock.
- The original rock prior to metamorphism could be shale, basalt, granite, sandstone, and tuff, to name a few.
- Most lode gold deposits sourced from metamorphic rocks because it is thought that the majority are formed by dehydration of basalt during metamorphism.
- It released the continents from the Earth's core and transformed them into icebergs of gneiss [granite] on a sea of basalt.
- A conclusion is that unlike the continents, oceanic crust is much less diverse, and basalt is the most common rock type.
- Granitic rock is typical of continents, while basalt predominates in ocean basins.
- It was early observed that although granite existed on continents, seafloor seemed to be composed of denser basalt.
- Chemically, gabbro is the same as basalt (gabbro forms when magma cools below the surface of the Earth, but basalt forms when the lava cools on the surface).
- Basalt originates from lava that has extruded onto the surface of the Earth.
- These sites usually produce basalt if the magma erupts at the surface, and gabbro if the material remains in the magma chamber.
- The molten magma extracted from harzburgite may then erupt on the surface as basalt.
- They were formed by lateritization (see laterite) of various silicate rocks such as granite, gneiss, basalt, syenite and shale.
- The honeycomb grid in the arms of Lelystad pictures the dykes, built with six-edged concrete or basalt blocks.
- The middle layer comprises basalt lava flows underlain by their frozen feeders, termed dykes.
- Basalt is similar in composition to mantle rocks, indicating that it came from the mantle and did not mix with continental rocks.
- In general, the basaltic magma of low viscosity can flow around the rekahannya, a basalt lava flows called basalt plateau.
- Being less dense than the basalt, the felsic magma tends to float on the mafic magma.
- When nepheline, the most common feldspathoid mineral in the world, also occurs in the rock, the basalt is described as a leucite nepheline tephrite.
- Basalt, alkali basalt, basanite, tephritic nephelinite, and nephelinite differ partly in the relative proportions of plagioclase and nepheline.
- A few igneous rock types with composition unlike basalt, such as nephelinite, do occur at the small basaltic cinder cones and flows but are extremely rare.
- Nephelinite is dark in color and may resemble basalt in hand specimen.
- Volcanoes with broad, gentle slopes and built by the eruption of fluid basalt lava are called shield volcanoes.
- The crustal portions of oceanic tectonic plates are composed predominantly of basalt, produced from upwelling mantle below ocean ridges.
- The oceanic crust displays an interesting pattern of parallel magnetic lines, parallel to the ocean ridges, frozen in the basalt.
- In contrast, alkali basalt is not typical at ocean ridges, but is erupted on some oceanic islands and on continents, as also is tholeiitic basalt.
- Lava flows have been erupted at many vents in the Cascade Range during Holocene time; their compositions range from basalt to rhyolite.
- Overall, 5 vents issued alkalic basalt lavas, with 2 of these vents producing flows that reached the sea.
- Oceanic crust is made of basalt (the most common rock on earth), while Continental crust consists of lower density materials like granite.
- Continental Crust - the continents, made up of granitic rock, lighter than basalt so it floats on the oceanic crust.
- The continental crust is like the igneous rock granite, and the oceanic crust is like basalt, another igneous rock.
- This is because oceanic crust is made of basalt, which is denser (heavier) than the granite rocks that compose continental crust.
- The upper part mainly consists of granite rocks, while the lower part consists of basalt and diorite.
- The granite rocks are less dense as compared to basalt.
- The original source rock prior to metamorphism is basalt, gabbro, and other rocks with iron and magnesium.
- The field is characterized by basalt, which is a black to dark gray volcanic rock formed from lava rich in magnesium and iron.
- Volcanic rocks rich in magnesium may be produced by accumulation of olivine phenocrysts in basalt melts of normal chemistry: an example is picrite.
- That magma crystallizes to mafic rocks such as gabbro and basalt.
- Basalt and gabbro are examples of mafic rocks.
- Though obsidian is dark in color similar to mafic rocks such as basalt, obsidian's composition is extremely felsic.
- Basalt is composed primarily of calcium-rich plagioclase feldspar (gray), olivine and various pyroxenes (dark minerals).
- Result? Mafic magmas produce dark colored rocks made of dark minerals (such as basalt), intermediate magmas intermediate colored rocks (e.g.
- Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc.
- Anorthite is characeristic of the basic igneous rocks such as gabbro and basalt.
- A gray or black, weakly magnetic mineral found in basic igneous rocks, notably basalt, and metamorphic rocks.
- Pahoehoe is a highly fluid, hot form of basalt which tends to form thin aprons of molten lava which fill up hollows and sometimes forms lava lakes.
- Most basalt lavas are of a'a or "pahoehoe" types, rather than block lavas.
- The caves along Cave Loop Drive are located in lava tubes that transported basalt of Mammoth Crater to the east, to Craig Cave and beyond.
- The rock is derived from basalt, gabbro or similar rocks containing sodium -rich plagioclase feldspar, chlorite, epidote and quartz.
- If the vesicles become subsequently filled with secondary minerals, e.g., quartz or calcite, the rock is called amygdaloidal basalt.
- Tridymite or quartz may be present in the fine-grained groundmass of tholeiitic basalt, and feldspathoids are absent.
- Basalt is fine grained because it cools very rapidly, whereas gabbro and granite are coarse grained because they have cooled slowly.
- Much of the crust is probably composed of a volcanic rock called basalt (buh SAWLT). Basalt is also common in the crusts of Earth and the moon.
- This chart is an example how minerals are used to interpret the metamorphism of basalt, the rock that makes up the crust of the world's ocean basin.
- Excluding the rocks between my ears, I'd have to say that basalt and granite have the honor of being the most important rocks in the crust.
- Basalt magmas have formed by decompression melting of the Earth's mantle and by partial melting of rock in the interiors of Mars and the Earth's moon.
- The similarity to REE patterns produced by the partial melting of an alkali basalt has been noted above.
- When basalt erupts underwater, the rapid cooling causes it to form a characteristic texture known as pillow basalt.
- This "glass" is formed naturally by the rapid cooling of molten basalt.
- These rocks have small crystals with a fine-grained texture (e.g., basalt, the most common rock of the seafloor).
- Basalt has small crystals while gabbro has large crystals.
- It's even heavier than the basalt, has an even higher percentage of the mafic minerals, and really doesn't want to be anywhere near the surface.
- Basalt, on the other hand, is mafic in composition -- meaning it is rich in pyroxene and, in some cases, olivine, both of which are Mg-Fe rich minerals.
- Anorthite is characeristic of the mafic igneous rock s such as gabbro and basalt.
- Anorthite is characeristic of the mafic igneous rocks such as gabbro and basalt.
- For example, the mafic minerals pyroxene and plagioclase feldspar make up the mafic igneous rocks, basalt and gabbro.
- For example, the mafic minerals pyroxene and calcium-rich plagioclase feldspar make up the mafic igneous rocks, basalt and gabbro.
- Pyroxene and feldspar are the major minerals in basalt and gabbro.
- Basalt. Consist of feldspar and a high proportion of dark coloured minerals such as olivine and pyroxene which the rock a dark appearance.
- Gabbro & Basalt have black or dark green color, which consists of feldspar (bytownite).
- The feldspars are essential constituents of nearly all crystalline rocks, such as Granite, gneiss, mica, slate, most kinds of basalt and trachyte, etc.
- Trachybasalt: An extrusive rock intermediate in composition between trachyte and basalt.
- Pyroxenites that occur as xenoliths in basalt and in kimberlite have been interpreted as fragments of such layers.
- Among the rocks that commonly include peridotite xenoliths are basalt and kimberlite.
- The crustal portions of oceanic tectonic plates are comprised predominantly of basalt, produced from upwelling peridotite in the mantle below ocean ridges.
- It is an important mineral in the Earth 's mantle and is common in peridotite xenoliths erupted in kimberlite and alkali basalt.
- On Earth, most basalt magmas have formed by decompression melting of the mantle.
- Basalt - Basalts may vary greatly in composition and form.
- Layers of Basalt.jpg Layer upon layer of basalts that form the Columbia Plateau region of the northwestern United States.
- These minerals occur both in the matrix of, and as amygdules in the porous roofs of basalt flows, and in veinlets within the basalts.
- Extrusive igneous rocks Basalt (an extrusive igneous rock in this case); light colored tracks show the direction of lava flow.
- Extrusive igneous rocks Basalt (an extrusive igneous rock in this case); light coloured tracks show the direction of lava flow.
- Some examples of extrusive igneous rocks are Basalt, Gabbro, and obsidian.
- There were two primary volcanic associations: the tholeiitic basalt - komatiite and the tholeiitic to calc-alkaline bimodal basalt - rhyolite.
- March 24 Flood basalt, komatiite, continental rifts pp.
- Basalt can be formed by partial melting of this pyrolite, which drives off the enriched basalt magma, leaving behind the depleted dunite.
- Olympus Mons is a shield volcano that extrudes Basalt, this means it dosnt explode at all, lava runs down the sides which makes it the gradual sloping shape.
- A shield volcano has a gently sloping cone due to the low viscosity of the emitted material, primarily basalt.
- Crater Peak is a shield volcano primarily made of andesite and basalt lava flows topped by andesitic and dacite tephra.
- Igneous Rock
- Events > Earthquakes > Plate Tectonics > Oceanic Crust
* Basaltic Andesite
* Basalt Composition
* Basalt Lava
* Basalt Magma
* Basalt Rocks
* Extrusive Igneous Rock
* Igneous Rock
* Igneous Rocks
* Igneous Rock Basalt
* Km Thick
* Oceanic Crust
* Ocean Floor
* Ocean Floors
* Olivine Basalt
* Rock Type
* Shield Volcanoes
* Tholeiitic Basalt
* Volcanic Rock
* Volcanic Rocks
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