"rocky surface" is a correct and usable phrase in written English.
It is often used to refer to a rough and uneven surface or land mass (e.g. a mountain). For example, "We had to carefully navigate the rocky surface of the mountain as we made our way to the summit."
A rocky surface fractured by bands of white light sparkles as if with hidden mineral activity.
· In 1976 two Nasa Viking craft landed on the Martian surface, beaming pictures of the planet's rocky surface back to Earth.
They may only seem dimmer now because the camera is averaging the light reflected from the spots and the darker rocky surface nearby.
The rocky surface has been replaced with Field Turf, a kind of artificial surface, lights have been installed and the seating areas have been renovated...
The old path once served one of the world's largest mercury mines, and the rocky surface still bears the ruts of wagon wheels.
Like our own Neptune, the planet lacks a rocky surface – it's a ball of gas – and is thought to be lifeless.
Where the rocky surface is perforated, there are natural sinkholes and caverns, around which the Maya had built their cities and ceremonial centres.
In warm, humid climates the recovery is rapid; a few decades will suffice to hide the rocky surface of solidified lava flows.
Then, starlight glancing off an ocean on the planet's limb will produce a glint that the same light glancing off a dull, rocky surface would not.
Gullies on Mars' rocky surface which some believe were carved out by running water could actually have been created by dry ice, new research has found.
The northern midshipman (P. notatus), a common species on the eastern Pacific coast, spawns in shallow water, attaching its eggs to a rocky surface.
