"underlying surface" is correct and usable in written English.
You can use it to describe something that is hidden beneath the surface of something else, or to describe the base layer of something. For example, "The underlying surface of the lake was muddy, making it difficult for us to stand in."
Wallpaper, for example, can usually be removed without damaging the underlying surface.
However, previous research has mostly focused on the homogeneous underlying surface rather than heterogeneous underlying surface.
As the lobe stretches out from a cell, it grabs onto the underlying surface with molecular clamps.
The method is also local, and the underlying surface representation is simple.
"It's basically from erosion of the underlying surface, or rubbing against mountainsides as the ice goes down," he says.
Consultants had said the underlying surface was only terra cotta, but a trial stripping has revealed a rich, red Brescia marble.
The technique of painting in thin layers of oil paints also allows a tremendous amount of bounce back light to strike the underlying surface of the white canvas.
They delight, if you let them, by clarifying the material givens of any painting: shape, scale, paint texture, underlying surface, and attachment to a wall.
The process doesn't create a strong bond between the Teflon and the underlying surface and, because it involves heat, it's useless for very delicate objects.
The bottom surface of a stratum roughly conforms to irregularities of the underlying surface; the stratification plane above the stratum, however, tends to be nearly horizontal.
At this point, it is worth to comment on the nature of interaction between the acene molecules and the underlying surface, and the interpretation of STS results.
