abundance of iron magnesium and calcium
gabbro
it is an intrusive igneous rock with composition equivalent of basalt.it is dark colored due to high concentration of dark minerals;olivine,biotite,hornblende.
His eyes are big and dark. Almost completely black.
dark brown
A dark brown
Gabbro is typically dark green to black in color, with small mineral grains that are difficult to see with the naked eye.
The igneous rock gabbro is black because its composition is mafic. Mafic rocks are low in silica and very high in magnesium and iron. It is the magnesium- and iron-rich content that causes its color to be black.
The streak color of gabbro is white to gray.
Gabbro is a dark-colored intrusive igneous rock that is composed mainly of pyroxene and plagioclase feldspar. It typically has a coarse-grained texture and can appear black, greenish-black, or dark gray in color. It can have a speckled appearance due to the presence of light-colored minerals like feldspar.
You can find minerals such as plagioclase feldspar, pyroxene, and olivine in gabbro. These minerals are typically dark in color and have a crystalline structure due to the slow cooling process of gabbro forming beneath the Earth's surface.
No, gabbro is not a felsic rock. Gabbro is classified as a mafic rock due to its dark color and high content of iron and magnesium minerals, while felsic rocks are light-colored and have a higher silica content.
Granite is an igneous rock with a coarse-grained texture that is typically light in color and contains quartz, feldspar, and mica minerals. Gabbro is also an igneous rock but has a finer-grained texture and is dark in color, composed mainly of plagioclase feldspar and pyroxene minerals. Overall, granite is lighter in color and coarser-grained compared to gabbro.
Oh, dude, gabbro is an intrusive igneous rock that's made up of mainly mafic minerals like pyroxene and plagioclase feldspar. It's like the cool, laid-back cousin of basalt, formed from magma that cools slowly beneath the Earth's surface. So yeah, gabbro is basically the rock that's chillin' underground, doing its thing.
Basalt is a fine-grained volcanic rock, usually dark in color, while gabbro is a coarse-grained intrusive rock that is also dark in color. Basalt tends to cool and solidify quickly on the Earth's surface, resulting in a fine-grained texture, whereas gabbro cools slowly beneath the surface, allowing larger mineral crystals to form.
The igneous rock you are describing is likely to be a type of mafic rock called gabbro. Gabbro forms from the slow cooling of magma deep within the Earth's crust and has a dark blackish-green color due to its high content of dark minerals such as pyroxene and amphibole.
gabbro
A coarse-grained igneous rock that is not granite is gabbro. Gabbro is primarily composed of plagioclase feldspar and pyroxene, and it forms from the slow crystallization of magma beneath the Earth's surface. Its dark color and dense texture distinguish it from granite, which is lighter in color and primarily composed of quartz and feldspar. Gabbro is commonly found in oceanic crust and intrusive igneous environments.