Why are igneous rocks that consist of very small crystals called aphanitic?
A) Aphanitic comes from the Greek word phaneros, meaning visible.
B) Aphanitic comes from the Greek word aphaneros, meaning invisible.
C) They form deep within the earth's crust.
D) They form deep within the earth's ocean.
Question 2
Why is the texture of the igneous rock obsidian glassy?
A) Obsidian commonly forms at the surface of lava flows.
B) Obsidian always forms beneath the earth's surface.
C) Obsidian is aphanitic.
D) Obsidian is phaneric.
The common squirrel monkey (Saimiri sciureus) is a small New World primate from the Cebidae (squirre
Oxidation of Fe-bearing minerals gives rocks, soils rusty color.
Clastic Sedimentary Rocks
The approval of a new drug is a four-stage process: (1) preclinical investigation, (2) clinical inve
A square matrix P is called a permutation matrix if each row and column of P contains exactly ...
a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger ...