limestone
From what I found he is the main actor in this Korean drama: Rock Rock Rock
bed rock
Alcatraz
The three main types of stress in a rock are shearing, tension, and compression.
The rock bauxite is the main ore of aluminum.
is rock and roll is rock and roll
Eroded rock
rock
The main musicians in a rock group are lead and base guitarists, drummer, keyboard player and singer.
The main ore of the element aluminum is bauxite.
The dynamic changes between the three main rock groups
it is a mixture of volcanic rock or "cooled lava" and sedative rock