Basalt is most probably what you are looking for.
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.
Dark, mafic rock is relatively rich in iron and magnesium.
Black to dark Grey, in most cause, though very rare to fine silver seams !
Noun 1. igneous rock - rock formed by the solidification of molten magma rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"andesite - a dark grey volcanic rockaplite - light-colored and fine-grained granitic rock consisting chiefly of quartz and feldsparsgroundmass - (geology) the matrix of fine-grained crystalline material in which larger crystals are embeddedadesite - dark greyish extrusive rockbatholite, batholith, pluton, plutonic rock - large mass of intrusive igneous rock believed to have solidified deep within the earthdiorite - a granular crystalline intrusive rockgabbro - one of a family of granular intrusive rockspegmatite - a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elementsperidotite - a dark coarse-grained igneous rock consisting principally of olivinerhyolite - very acid volcanic rockvolcanic rock - extrusive igneous rock solidified near or on the surface of the Earthporphyritic rock, porphyry - any igneous rock with crystals embedded in a finer groundmass of mineralssodalite - a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks
gabbro
Bogey
Most dark-colored igneous rocks are mafic, which means they are rich in minerals like pyroxene, olivine, and amphibole. These minerals give the rocks their dark color due to higher iron and magnesium content. Additionally, dark-colored igneous rocks are typically extrusive, forming from rapid cooling at the Earth's surface.
Extrusive rocks are dark in color because they cool quickly on the Earth's surface, preventing large mineral crystals from forming. The rapid cooling traps small mineral grains and results in a fine-grained texture, which gives the rock its dark appearance. Additionally, the presence of dark-colored minerals, such as basalt or amphibole, contributes to the overall dark color of extrusive rocks.
The majority of igneous rocks made from melted rocks near Earth's surface are typically dark in color, such as black, dark gray, or dark green. This is due to the presence of minerals like olivine, pyroxene, and amphibole that create these dark hues in the rocks.
They are referred to as mafic, a word representing their magnesium and iron content.
Could be basalt, an extrusive igneous rock.
Igneous rocks formed from hardened lava include basalt, andesite, and rhyolite. Basalt is a fine-grained, dark-colored rock commonly found in oceanic crust, while andesite and rhyolite are intermediate to felsic in composition and typically found in volcanic arcs or continental volcanic regions.
Dark igneous rocks usually have higher amounts of heavier elements such as iron. Light-colored igneous rocks tend to be richer in lighter elements like sodium and aluminum.
igneous with small crystals. Extrusive igneous rock forms from the solidification of lava. Rocks such as rhyolite, pumice, obsidian, and basalt. Igneous rocks are formed by magma (inside the earth) or lava (outside earth) that cools and hardens. Extrusive rocks are rocks thathave exited the earths surface.
i dont no
less dense
igneous