This technique is common in both civil engineering site investigations (where the techniques tend towards into pile driving) and geological studies of recent aquatic deposits. The penetration forces, if recorded, give information about the strength of different depths in the material, which may be the only information required, with samples as an incidental benefit.

gravity coring, in which the core sampler is dropped into the sample, usually the bed of a water body, but essentially the same technique can also be done on soft materials on land.

(The Mars Exploration Rovers carry a Rock Abrasion Tool, which is logically equivalent to the 'rotary sidewall core' tool described below.) Taking samples from an exposure, albeit an overhanging rock face or on a different planet, is almost trivial. However it is also possible to take core samples from the wall of an existing borehole. Core samples are most often taken with their long axis oriented roughly parallel to the axis of a borehole, or parallel to the gravity field for the gravity-driven tools. The range of equipment and techniques applied to the task is correspondingly great. The composition of the subject materials can vary from almost liquid to the strongest materials found in nature or technology, and the location of the subject materials can vary from on the laboratory bench to over 10 km from the surface of the Earth in a borehole. Granitic rock core from Stillwater igneous complex, Montana (from a spoil pile).

Core samples can also be taken of living things, including human beings, especially of a person's bones for microscopic examination to help diagnose diseases. Removed from the tube in the laboratory, it is inspected and analyzed by different techniques and equipment depending on the type of data desired.Д¬ore samples can be taken to test the properties of manmade materials, such as concrete, ceramics, some metals and alloys, especially the softer ones. In the coring process, the sample is pushed more or less intact into the tube. More continue to be invented on a regular basis. A variety of core samplers exist to sample different media under different conditions. The hole made for the core sample is called the 'core hole'. Most core samples are obtained by drilling with special drills into the substance, such as sediment or rock, with a hollow steel tube, called a core drill.

A pied butcherbird perches nearby.ДЄ core sample is a cylindrical section of (usually) a naturally-occurring substance. Rock core samples, the product of a diamond rig.

Core data lab metchods