The surface expression is rarely preserved, but is usually similar to a maar volcano.

His aggression is the surface expression of what is, in many boys, an underlying depression.

Spindletop Hill turned out to be the surface expression of an underground salt dome, around which the oil accumulated.

If due to some mutation all of the three boxes are damaged, there is no surface expression of the protein.

The fault has no surface expression and prior to the earthquake was not known about.

Any help which tackles only the surface expression of the doubt lacks compassion and is bound to fail.

The result was music that felt manipulated, a surface expression of grief rather than a heartfelt exploration of it.

Currently, some potential new geothermal fields are being surveyed that have no surface expression.

It is the surface expression of melting within and above the plunging subducting slab.

The surface expressions of hydrocarbon migration are referred to as seeps.