Guides and Articles
Core Drilling: Rock Samples, Depth Records and Investigation Outputs
Understand drill core as a physical information source, its difference from cuttings, and how sample identity connects with geological interpretation.
Core drilling provides a core of material from a drilled location. Within geological investigation, the core is a physical information source: its material can be examined alongside records showing where it came from. The recovered material and the explanation of its geological meaning are different outputs.
Core and Cuttings
The Kansas Geological Survey overview distinguishes cylindrical rock core from fragmentary cuttings. These forms preserve different physical representations of the material encountered during drilling.
A core record can connect changes in material with positions along the recovered sequence. The core itself is not a complete geological conclusion. It provides evidence that a professional can consider with other information about the site.
Location Gives the Material Context
The hole identity and associated depth records connect the material to a particular part of the investigation. Several cores from one site should remain distinguishable. A box of material identified only with the project name cannot explain the same spatial relationships as a properly connected project record.
For example, an investigation comparing several locations needs to know which material belongs to each one. A later review of one interval needs a more specific reference than the site address. These are information requirements, separate from the physical drilling task.
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Field Work and Interpretation
A drilling contractor carries out the contracted drilling contribution. A geological assessment considers what the evidence means for the investigation. Laboratory information, where commissioned, introduces another evidence source rather than replacing location records.
Core drilling can be part of exploration drilling. The first name identifies the recovered-material format; the second identifies the investigation purpose. They overlap without being identical service descriptions.
Questions About a Core-Drilling Enquiry
Is a core the same as a geological report?
No. One is physical evidence; the report explains evidence in relation to a question.
Why retain the hole and depth references?
They connect the material with the part of the ground it represents.
What should the project output identify?
The drilling records, recovered material and the separate interpretation work being commissioned.