Any exploratory hole drilled into the earth or ice to gather geophysical data Climate researchers often take ice core samples, a type of borehole, to predict atmospheric composition in earlier years
The physical hole created by boring or drilling The term borehole is used in a descriptive sense, as in borehole axis, borehole diameter, borehole effect, etc
Any exploratory hole drilled into the Earth or ice to gather geophysical data Boreholes can be used to try to put together a "natural" temperature record
A borehole is a deep round hole made by a special tool or machine, especially one that is made in the ground when searching for oil or water. a deep hole made using special equipment, especially in order to get water or oil out of the ground