The lower the viscosity is the hotter the magma is and faster it flows.Higher the viscosity is the cooler it is and slower it flows down.
Dark exterior colors absorb heat and ultraviolet rays which are both very oxidizing elements therefore dark exterior finishes generally chalk up sooner and require more frequent maintenance
The dark coloured concrete surface absorbs more heat energy and therefore reflects less heat energy.
The igneous rock peridotite has a very high color index. It is comprised of more than 95% mafic minerals (like olivine), giving it a dark green color.
Most likely black maybe a dark gray.
The dark-colored mineral in coarse-grained igneous rocks is likely to be biotite or hornblende. These minerals are commonly found in rocks like diorite, gabbro, and basalt.
Dark, mafic rock is relatively rich in iron and magnesium.
Two examples of fine-grained igneous rocks are basalt and rhyolite. Basalt is a dark-colored rock with a composition rich in iron and magnesium, while rhyolite is light-colored and has a high silica content. Both rocks form from the cooling and solidification of molten magma.
Most igneous rocks are formed from two main types of rocks: basalt and granite. Basalt is a fine-grained, dark-colored rock that forms from rapidly cooled lava, while granite is a coarse-grained, light-colored rock that forms from slowly cooled magma beneath the Earth's surface.
Three types of igneous rocks are basalt, granite, and obsidian. Basalt is a dark-colored fine-grained rock, granite is a light-colored coarse-grained rock, and obsidian is a natural glass formed from rapidly cooled lava.
The igneous rock you are referring to is basalt. It is a fine-grained, dense, and dark-colored rock that forms from low-silica magma rich in iron and magnesium.
The dark-colored igneous rock rich in iron and magnesium is called basalt. Basalt is a fine-grained rock that is commonly found in volcanic areas and oceanic crust. It is characterized by its dark color due to the presence of minerals like pyroxene and olivine.
Normally, light colored igneous rocks are less dense compared to dark colored igneous rocks. This is because the light colored rocks have a less iron in them.
less dense
igneous
The cooling rate of magma is the primary factor that affects the texture of igneous rocks. Rapid cooling results in fine-grained texture, while slow cooling leads to coarse-grained texture. The mineral composition of the magma also influences the texture, with high silica content producing light-colored and fine-grained rocks, and low silica content resulting in dark-colored and coarse-grained rocks.
Mafic igneous rocks, like basalt, are dark colored and low in silica.