I assume you re not talking about rocks meaning boulders but rather the layer of small stones you see not just on gas stations but on many flat roofs.
Rock the roof meaning.
To rise to a very high level.
It probably is related to a literal roof of a house.
The weatherproofing layer of gravel gives the roof s surface a longer life and helps prevent cracking blistering and degradation which could lead to leaks or other material failures over time.
A rooftop is the outside part of the roof of a building.
Meaning pronunciation translations and examples.
Ideally the stones are river gravel which has smooth edges and won t cut into the roof when somebody walks around on it.
Roof pendants can be studied to determine some of the conditions that existed at the time of intrusion such as the temperature and fluid composition of the magma.
To reach extreme heights.
To get very angry.
They are exposed by erosion of the overlying rock.
Even though the asphalt waterproofs the roof highly important for flat roofs the gravel provides an important life extending extra layer.
The presence of roof pendants indicates that the igneous body is being observed near its upper surface.