In brief, his theory was that ore is deposited from groundwater circulating in subsurface fissures.
In subsurface drainage open ditches and tile fields intercept groundwater and carry it off.
The underlying cause of all earthquakes is the build-up of stress in subsurface rocks—invisible at the Earth's surface.
"Two years ago we had scant idea about what microbes are present in subsurface rocks or what they eat.
By measuring changes in the resistance to the current, scientists recorded variations in subsurface densities, evidence of buried building foundations and street pavements.
Subsequent downward translocation (migration) of the reduced iron in the soil profile is associated with gray or blue colours in subsurface horizons (layers).
Since nearly all pores in subsurface sedimentary formations are water-saturated, the migration of oil takes place in an aqueous environment.
Gelhar (1993) presented stochastic method in subsurface hydrology.
Effective porosity is a key factor in subsurface fluid flow.
They are used to display variation in subsurface resistivity with depth.
