packing

In geology, "packing" refers to the distribution of grains and the spaces between them within a sedimentary rock. This arrangement significantly influences the rock's porosity and permeability, affecting its ability to hold and transmit fluids like oil and water. Packing is controlled by grain size, shape, and the degree of compaction, which in turn determines the rock's overall density. Analyzing thin sections under a microscope helps describe packing by examining grain-to-grain contacts and the ratio of grain lengths to the total traverse length. In mathematics, packing problems involve efficiently placing geometric figures within a given space.123