This document aims to establish an appropriate geological framework and resource potential baseline for DEM's knowledge about lime sand on Kangaroo Island (KI), by showing and discussing what new lime sand resource areas are available, based on the results of recent geological investigations, and by providing data which can be used for any future resource estimation exercise. The study has resulted in the selection of nine regions of interest, which in turn have been subdivided into variable subregions. Out of those, five have been selected for more detailed investigation, including site visits as well as sampling and analysis of the lime sand. The Semaphore Sand Member and the Bridgewater Formation are the two main geological units which are suitable for providing an extensive and long-lasting lime sand supply on KI. However, the main geological unit that will yield lime sand suitable for agricultural use is the Semaphore Sand Member, as it has Effective Neutralising Factor (ENF) values that are well above 60: by contrast, the Bridgewater Formation has a lesser and variable potential to do this, because its ENF values are generally below 60. Being much older material, the Bridgewater Formation can also be variable cemented/consolidated, and in many cases would need crushing in order to gain the loose lime sand product needed. The Semaphore Sand Member is generally unconsolidated, and can be used in most cases as a ready to go lime sand product.