How to Read Borehole Logs Part 2: Explaining Rock Core Data

In this second part of our series on interpreting borehole logs, we shift our focus from soil to rock core samples. Understanding how to read and describe rock data is a fundamental skill for geotechnical engineers and geologists. Timestamps: 0:00 Introduction: Shifting from Soil to Rock 1:40 Weathering Symbols and Degrees 2:30 Assessing Rock Strength in the Field 3:45 Fracture Spacing and RQD Explained 5:10 Understanding Graphic Log Patterns 7:50 Detailed Guide to Discontinuities (Types & Roughness) 11:00 Aperture, Infill, and Staining 14:15 Summary & Key Takeaways We break down the symbols and data you'll find in a real borehole log, including rock strength, weathering degrees, and how to interpret complex discontinuity data. In this video, you will learn: How to identify rock core samples and their properties. Decoding weathering symbols (EW, HW, MW, SW). Understanding rock strength levels from "Extremely Low" to "Extremely High." How to calculate and interpret Fracture Spacing and RQD (Rock Quality Designation). Detailed walkthrough of discontinuities: types, roughness, aperture, and infill material. A guide to common graphic log patterns for different rock types. Related Videos: How to Read Borehole Logs: Part 1 (Soil Deposits) https://youtu.be/288zaBmDDWo How to Measure RQD (Rock Quality Designation) https://youtu.be/NMNzMLSO91w If you found this guide helpful, please Like the video and Subscribe for more geotechnical engineering tutorials! #geotechnicalengineering #Geology #BoreholeLogs #RockCore #CivilEngineering #SoilMechanics Here is the link to download the borehole log and legend https://drive.google.com/file/d/1eIeemTR7zWSM7Dd-vn9l2M2gOqp6x_wF/view?usp=sharing