Bedrock could vary in hardness from chalk to granite.
It is just the hard sort. Most hard rock was constructed by slow solidification of magma but some metamorphosed sedimentary and igneous rocks can also be considered to be 'hard rock'. And most igneous rocks except volcanic ejecta are hard. But to a geologist a hard rock usually means a slowly solidified magma in which minerals had time enough to form visible crystals.
It is a limestone, hard.
a sharp hard rock
A hard grey rock beginning with f
Hard rock, an example of soft rock is Barton-on-sea.
Technically, yes. But, they are Christian Hard-Rock. Specifically Christian Hard-Rock.
Hard as a Rock was created in 1994.
Rock Hard was created in 1985.
Hard rock: GraniteSoft rock: Sandstone
There are 13 Hard Rock Hotels. Six of the Hard Rock Hotels are attached to Hard Rock Casinos. The Hard Rock Hotel and Casino sites are in Biloxi, Hollywood, Las Vegas, Macau, Punta Cana, and Tampa.
I don't think it has an origin. Its more of a common sense saying. Rock= hard therefor hard as a rock.
Hard rock is quite hard to define. Sometimes it is confused with heavy rock, but the two are slightly different (heavy rock is heavier and sometimes has more bass than hard rock). Also, the softer edge of hard rock bleeds into rock.
rock is hard tree is hard game is hard gg
Hard Rock Café
you associate limestone rock with hard water.
Hard rock and heavy metal
Hard Rock Hell was created in 2007.