The name of the dense volcanic glass that is typically black in color is obsidian.
Dense DOES mean the same a Dark. Its the color and the texture such as black, brown, or navy blue.
because it is very dense and do not pass the sun light.
A volcanic arc is a chain of volcanoes which form in a curved shape. They are formed when a more dense oceanic plate collide with less a dense one.
The more dense plate could move under the less dense plate producing magma which can lead to volcanic eruptions
more dense plate move under less dense plate
They are usually about the same density as non-volcanic rocks. The one exception is pumice, which is so full of holes that it is less dense than water.
Black Holes are the most dense. Second to black holes would be Neutron Stars
Ebony is a dense black wood and the word is often used to describe something that is very black in color. Dark-skinned girls are often called 'ebony girls'.
Volcanic arcs are formed as a more dense oceanic plate collides with a less dense oceanic plate, subducts, and creates molten material which rises through the overriding plate, which in turn creates submarine volcanoes. The volcanoes may grow until they eventually breach the surface of the water, producing volcanic arc landmasses.
Basalt has a reddish brown streak. It is a dark and dense igneous rock of a minor lava flow.
aids
White