A sterile stratum that lies above the stratum being investigated
The rock and subsoil that lies above a mineral deposit such as a coal seam.
To overload or overtax.
To encourage or heavily exert force or influence.
A pressing; a force applied to a surface.
Distress.
The amount of force that is applied over a given area divided by the size of this area; force per unit area.
A contrasting force or impulse of any kind
Urgency