The calcite and opal content data together with MST and index properties measurements in Core 17H provide a very useful data set for the study, aiming toward a better understanding of how the changes in the sedimentation types are influencing the variations in physical properties of sediments. Core 17H was especially suited for this task because of high variability in physical properties. The intrinsic understanding of the relations between the sediment composition and physical properties may lead to the development of the regression equations that will allow us to estimate sediment content based on fast and relatively inexpensive petrophysical measurements. One must keep in mind that Core 17H is not a two- (opal and calcite) but a three-component system (calcite, opal, and clay), which makes future interpretations more difficult—yet also more interesting.