Add to ORKGMany engineering geologists devote a significant proportion of their time to the logging of boreholes and, specifically, to the interpretation of rock cores in engineering terms. A variety of techniques have been devised for logging such cores. In Malaysia, the common practices are often inadequate in relation to modern requirements. This paper reviews the application of accurate rock core logging in rock mechanics and in engineering design process. It tries to compile some of its applications as a design aid in rock engineering. It is intended for geologists who are involved in geotechnical engineering to understand the relationship between accurate rock core logging and the design process in rock engineering. The importance and relation o...