vous me faites dur comme la pierre
It matters in the middle of the lies the core which would make it hard to pressurize and heat
Mainly boulder clay (Soft rock) and chalk (Hard rock) these are what also form headlands and bays due to the difference in their resistance to weathering.
Hard rock, an example of soft rock is Barton-on-sea.
It is a limestone, hard.
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.
you can crush it good or you can scratch it on something hard
b
Presumably by recrystallization.
granite
No, this is not possible, it would be as hard as a rock!
Rapids form when there is hard rock and soft rock together. The water goes over the hard rock and then cuts through the soft rock. This makes a bump where the hard rock is and when the water goes over it the water is going to go up with the bump. These can make pot holes sometimes.
The most common rock is an igneous rock e.g. Granite.
Technically, yes. But, they are Christian Hard-Rock. Specifically Christian Hard-Rock.
When it cools down it turns hard and turns into rock
Hard rock: GraniteSoft rock: Sandstone
Hard as a Rock was created in 1994.
Rock Hard was created in 1985.