I
In geology, a naturally occurring and coherent aggregate of mineral s.
The three major classes of rock
sedimentary , and metamorphic
are based on the processes that formed them. These three classes are further subdivided on the basis of various factors, especially chemical, mineralogical, and textural attributes (see e.g., acid and basic rocks ; crystalline rock ; extrusive rock ). See also felsic rock ; intrusive rock ; mafic rock .
II
[c mediumvioletred] (as used in expressions)
phosphate rock
Ayers Rock
crystalline rock
Dome of the Rock
extrusive rock
felsic rock
Hudson Rock
igneous rock
intrusive rock
Little Rock
mafic rock
metamorphic rock
rock art
rock crystal
rock glacier
rock music
rock and roll
{{link=Rock River">Rock River
sedimentary rock
siliceous rock
acid and basic rocks