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=== Importance of Subsurface mapping ===
Most of the geological maps onlyallows showfor theunderstanding superficial deposits and outcrops, which allowsabout the publiclocal to[[lithology]] discover theand geological structures thatwhich areis aboveimportant thefor seageological surfaceinterpretations. ForTo mostfurther ofsupport thegeological geologyresearch relatedand disciplinesengineering work, suchunderstanding asthe [[geotechnical engineering]],subsurface [[volcanologylithology]], [[geomorphology]],and [[civilstructures engineering]],underneath explorationis geology,also however,necessary. understandingBorehole ondrilling is one of the subsurface structurescommon and totraditional amethods smallof extent,exploring lithologythe subsurface, isbut asit importanthas asseveral thoselimitations. onOther surface.than Onebeing ofinvasive traditionalto methodthe wouldground besurface, boreholeonly drillingsmall-scale butstructures itcan isbe invasivefound tovia theborehole ground surfacedrilling. InsteadCountering these limitations, geophysical survey isbecomes a non-invasive practical alternative for subsurface exploration and thus subsurface mapping.
=== Ambient noise as alternative geophysical survey method ===
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