Is obsidian mafic or felsic?

Is obsidian mafic or felsic?

It is sometimes classified as a mineraloid. Though obsidian is usually dark in color, similar to mafic rocks such as basalt, the composition of obsidian is extremely felsic.

Is obsidian a mafic rock?

It is sometimes classified as a mineraloid. Though obsidian is usually dark in color similar to mafic rocks such as basalt, obsidian’s composition is extremely felsic. Crystalline rocks with obsidian’s composition include granite and rhyolite.

Is there fake Obsidian?

Obsidian. This can be a particularly insipid fake; true Obsidian is volcanic glass, which is obviously quite similar to man-made glass, both in appearance and composition. Some pieces are easy to identify as fakes – primarily due to their clarity. Fake Black Obsidian is very hard to identify, unfortunately.

Is the composition of obsidian mafic or felsic?

Is Obsidian mafic or felsic? It is sometimes classified as a mineraloid. Though obsidian is usually dark in color, similar to mafic rocks such as basalt, obsidian’s composition is extremely felsic. Obsidian consists mainly of SiO2 (silicon dioxide), usually 70% or more.

What kind of silicon dioxide is in Obsidian?

Obsidian consists mainly of SiO2 (silicon dioxide), usually 70% or more. Crystalline rocks with obsidian’s composition include granite and rhyolite. Likewise, what does felsic intermediate and mafic mean?

Where can you find mafic obsidian in the world?

Mafic obsidians are scarce, but they have the same appearance. Obsidian is an uncommon rock, but can be examined at several famous localities in America, such as Obsidian Cliff in the Yellowstone Caldera (northwestern Wyoming, USA) and Big Obsidian Flow in the New Obsidian is an easily recognizable igneous rock.

How is a mafic rock different from a felsic rock?

Either in describing rocks or lava, mafic means that the lava or rock has less silica while felsic implies that the lava or rock has the most silica. Similarly, how is an intermediate igneous rock different than a felsic or mafic igneous rock in terms of composition and color?