Purely a matter of opinion and taste.
Igneous rock, metamorphic rock, and sedimentary rock.
There are countless rock groups around the world spanning various subgenres and styles, making it difficult to determine an exact number. New rock groups are constantly forming while others disband, so the number is always changing. Ultimately, the number of rock groups is vast and continually evolving.
The dynamic changes between the three main rock groups
This is just my opion but id say the top four rock groups/singer not in the rock and roll hall of fame is rush,scriopions,dire straits and Stevie ray Vaughan.
The most common rock forming mineral groups would be: silicates, carbonates, sulfates, sulfides, halides, and oxides.
No
Intrusive/Extrusive?
100,000,000+
This is just my opion but the top five rock groups/singers not in the rock and roll hall of fame is rush,scriopions, dire straits, and stevey ray vaughn.
Mick Rock has written: 'Exposed' -- subject(s): Portraits, Rock groups, Rock musicians 'Classic Queen' -- subject(s): Pictorial works, Queen (Musical group), Rock groups, Rock musicians 'Picture this' -- subject(s): Women singers, Portraits, Blondie (Musical group), Rock musicians
penguins rock
Clastic, Chemical, and Organic