what is acid rock??

Question

and please dont tell me rock music! thankies =]

Answer 1

Acid rock also know as Igneous rocks. Intrusive igneous rocks are formed from magma that cools and solidifies within the earth. Surrounded by pre-existing rock (called country rock), the magma cools slowly, and as a result these rocks are coarse grained. The mineral grains in such rocks can generally be identified with the naked eye. Intrusive rocks can also be classified according to the shape and size of the intrusive body and its relation to the other formations into which it intrudes. Typical intrusive formations are batholiths, stocks, laccoliths, sills and dikes. The extrusive types usually are called lavas.

Answer 2

This is a VERY archaic term that was developed because the chemical formula for silica SiO2 is not ionically balanced, much like sulfate SO4 ion that is a component of Sulpheric Acid. We now know that silica can form non-ionic bonds, much like its chemical sister Carbon. High silica rock, usually rich in quartz and other silica minerals, was classified as being Acid. The term has outdated its usefulness and is quite confusing to people trying to undersand the nature of rock and crystal formation.

Answer 3

I have never heard this term used outside of the music world, but I do know that some of the mines where I live produce ores that generate acid runoff, while the ores from other mines do not produce acid runoff. The ores that produce acid are generally rocks that include sulfide minerals formed in a reducing environment (no oxygen). Acid is produced when the sulfides are exposed to air. Ores that include oxide minerals do not produce acid.

Answer 4

Jason was on the right track. Acid rocks are igneous rocks high is silica as opposed to mafic rocks. I am a geologist and it took some searching in my memory banks to come up with that one. It is not a term that is used that often except with aqueous liquids.

Answer 5

A term usually applied to igneous rocks (i.e. rocks crystallised from magam/lava) with a high proportion of silica. I can't remember the exact thresholds, but the classification is something like this:

<45% silica = ultrabasic
45-55% silica = basic
55-65% silica = intermediate
>65% silica = acid

If you want to kow the exat values look in a geochemistry textbook!

Answer 6

Music either created or intended to be listened to while on acid (LSD). Think Pink Floyd, Grateful Dead, Jimi Hendrix, etc.

Answer 7

acidic rocks are generally the same as felsic rocks.

Basalt (i remember it base-salt) and mafic rocks are generally basic.