Примери за използване на Mafic на Английски и техните преводи на Български
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A secondary mineral in mafic igneous rocks;
In mafic and ultramafic rocks, and serpentinites;
A secondary mineral in mafic igneous rocks;
A mafic(basaltic in composition) metamorphic rock.
Commonly in metamorphosed limestones or mafic igneous rocks; rarely in pegmatites;
A mafic, subvolcanic rock; equivalent to volcanic basalt.
A secondary or hydrothermal mineral in veins and cavities in mafic volcanic rocks;
In mafic igneous rocks and granites(Anthony et al., 2001- 2005).
Though obsidian is dark in color similar to mafic rocks such as basalt, obsidian's composition is extremely felsic.
Mafic and ultramafic igneous rocks host practically all primary PGM ore of the world.
Basalt is dark and finely-grained, a mafic rock type rich in iron and magnesium, and can be either extrusive or intrusive.
An accessory mineral in igneous and metamorphic rocks,with crystals reaching large size in mafic pegmatites and carbonatites;
In potassium-rich mafic and ultramafic lavas(Anthony et al., 2001- 2005).
Produced by regional orcontact metamorphism of magnesium carbonate, mafic, or ultramafic rocks(Anthony et al., 2001- 2005).
Since basalt is mafic, it contains minerals with significant iron and magnesium.
In limestones, marbles, a common cement in sedimentary rocks, and as gangue in hydrothermal veins;in alkalic to mafic igneous rocks;
Also from mafic, high-temperature contact metamorphic, and hydrothermally altered rocks;
A strombolian eruption occurs when the magma is less mafic, but still predominantly mafic, and the gas content is higher.
In mafic and ultramafic igneous rocks and thermally metamorphosed impure dolomitic limestones(Anthony et al., 2001- 2005).
Felsic magma, such as rhyolite,traps more gas than mafic magmas and, as a result, volcanoes with felsic magma tend to be more explosive.
Also in mafic metamorphic rocks, low- to high-temperature hydrothermal veins and in vugs in rhyolite(Anthony et al., 2001- 2005).
Igneous and meta-igneous rock with a very low silica content(less than 45%),composed of usually greater than 90% mafic minerals.
Basalt is an igneous, mafic, and volcanic rock which is produced by lava flows in many different volcano types.
Also in skarns, some pegmatites, pneumatolytically orhydrothermally altered mafic igneous rocks, and ejected volcanic blocks(Anthony et al., 2001- 2005).
Basalt is extrusive, mafic, and common throughout the Solar System whereas granite is intrusive, felsic, and common only on Earth.
These types of eruptions are common on volcanic islands andat places where the magma has a particularly mafic, specifically basaltic, composition such as oceanic island arcs and on ocean islands near hotspots.
The volcano comprises mainly mafic material which has been brought up to the surface caused by unroofing of the mantle due to this rift formation.
Changes in seismic wave velocities have shown that at a certain depth(the Conrad discontinuity), there is a reasonably sharp contrast between the more felsic upper continental crust and the lower continental crust,which is more mafic in character.
These felsic protocontinents(cratons) probably formed at hot spots from a variety of sources: mafic magma melting more felsic rocks, partial melting of mafic rock, and from the metamorphic alteration of felsic sedimentary rocks.
Changes in seismic wave velocities have shown that at a certain depth(the Conrad discontinuity), there is a reasonably sharp contrast between the more felsic upper continental crust andthe lower continental crust, which is more mafic in character.