core sample


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core sample

[′kȯr ‚sam·pəl]
(geology)
A sample of rock, soil, snow, or ice obtained by driving a hollow tube into the undisturbed medium and withdrawing it with its contained sample or core.

core

core, 6
1. The center of a plywood or crossbanded construction; it may consist of lumber (solid or glued) or particleboard; serves as a base for veneer.
2. The internal structure in a hollow-core door.
3. The wood chips cut from a mortise.
4. The metal bar to which a handrail is attached.
5. The internal structure which serves as a base for complex plasterwork.
6. The molded open space in a concrete masonry unit.
7. The filling within a thick hollow stone wall.
8. The filling between a lintel and relieving arches.
9. A cylindrical sample of hardened concrete or rock obtained by means of a core barrel and drill.
10. A part of a multistory building, containing a variety of service and utility functions, as elevators, stairwells, etc.
11. That part of a magnetic circuit (usually steel or iron laminations) about which are wound coils in electromagnetic devices such as transformers, solenoids, relays, etc.; a magnetic core.
12. (Brit.) The conductor of a cable with its insulation, but not including any outer protective covering.
13. That portion of a grille, 2 contained within the frame.
14. Of gypsum board, the hardened material filling the space between a face paper and a back paper; consists primarily of gypsum with additives.
15. (British) Same as blockout.
References in periodicals archive ?
16 core samples collected from the Y carbonate reservoir were used for this study.
In this sociogram, nodes are colour-coded according to sample stratum: red for the core sample, pink for direct neighbours based in Canada, light pink for indirect neighbours based in Canada, light green for foreign-based direct neighbours and dark green for foreign-based indirect neighbours.
Some researchers indicated that gas slip effect can be prevented by increasing pore pressure of high permeable core samples, but the study about tight sandstone is rare, and the results of tight sandstone are very different.
Three soil core samples (10 cm diam x 10 cm deep) per plot were collected on 2 sampling dates, about 6 to 8 wk after seeding and 14 d later; cores taken in the first and second sampling dates are herein referred to as first and second core samples, respectively, as indicated in Table 1.
Basic petrographic characteristics of core samples and both groups of surface analogues are summarized in Table 2.
For comparisons of tonsillar surface and core samples, a paired specimen analysis of each individual tonsil was performed.
Transient time for compressional and shear waves are recorded for each stressed core sample before water saturation.
Electron photomicrographs of the fracture surface of core samples reveal that the binder attachments between sand grains appear very similar to those of other binders (Fig.
In addition, the oil & gas company said two core samples taken from Deep Well A8 on the Airshagyl structure at its flagship BNG contract area in western Kazakhstan, have undergone preliminary analysis that shows them to be porous and oil-and-gas bearing.
Specifically, the wettability difference between the natural porous surface and modeled interface poorly reflects the real microdisplacement in natural core samples. Also, the 2D etching glass model cannot be perfectly related to the natural 3D core sample.
The work provides numerous equations, tables and illustrations including a collection of core sample images.
Since only one specimen from each other rock sample (core sample or surface analogue) was prepared, the standard progress of the laboratory tests could not be followed.