Everything about Bedrock totally explained
Bedrock is the native
consolidated rock underlying the surface of a terrestrial planet, usually the
Earth. Above the bedrock is usually an area of broken and weathered
unconsolidated rock in the basal
subsoil. The top of the bedrock is known as
rockhead and identifying this, via excavations, drilling or
geophysical methods, is an important task in most
Civil engineering projects. Superficial deposits (also known as
drift) can be extremely thick such that the bedrock lies hundreds of metres below the surface.
A
solid geologic map of an area will usually show bands of differing rock type, for example, rock that would be exposed at the surface if all
soil or other superficial deposits were removed. The different rock strata or layers that are indicated may be a result of either nonparallel (sloping) surface erosion at the edges of flat strata
or normal surface erosion of tilted strata that has removed the upper portions of higher layers.
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