Description: “Aggregates” is the term geologists use to describe rocks used for building and construction purposes. Aggregate Potential Mapping aims to identify areas where aggregate is most likely to be found. Overburden is the thickness of soft sediment above a bedrock source of crushed rock aggregate. It is of vital importance to the viability of an extractive operation at that location. The county depth to bedrock (DTB) maps compiled by GSI using borehole and outcrop data was used to estimate overburden thickness.This map shows the overburden scores used to create the crushed rock aggregate potential across Ireland.High scores indicate minimal or no overburden. Low scores indicate thick overburden.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas). The data is shown as polygons. Each polygon holds information on the county it is located, Depth to Bedrock (m), Overburden Type and score.Please read the metadata lineage for further information.