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Abstract: The “Aggregate Resources of Ontario—2020” (or ARO—2020) is a GIS-based compilation of the aggregate resources of Ontario is based on data compiled from aggregate resources inventory mapping conducted by the Ontario Geological Survey (OGS) from 1980 to 2020. This compilation, updated in June 2021, includes data updated from the previously published information and may include newer geological data and/or mapping, where the latter are available. It is intended that this compilation will be updated annually.

It is important to note that this compilation is “not” intended to be used as a standalone product and the referenced original reports (Aggregate Resource Inventory Papers) should always be consulted in conjunction with this compilation. Information contained within the referenced original reports (i.e., test results, resource properties and potential) is still highly relevant. However, it is possible that resource estimates provided in the referenced original reports may no longer be accurate, and may not reflect the data contained in this compilation. It must also be noted that, although the data represented in this compilation have been modified and updated since the release of the previously published information, the referenced original publications have not been revised to incorporate these changes.

The compressed (ARO-2020.zip) download file provides data in geodatabase format using ESRI® ArcGIS® 9.3.1 with a completed project file (.mxd). Geospatial data are provided in North American Datum 1983 (NAD83) geographic co-ordinate system using decimal degrees. A user document and readme file that explains the GIS content is provided.

Purpose: The purpose of the Aggregate Resources Inventory Program is to provide the basic geological information required to include potential mineral aggregate resource areas in planning strategies. The aim is to assist decision-makers in protecting the public well being by ensuring that adequate resources of mineral aggregate remain available for future use. Aggregate Resources Inventory Papers (ARIP) are technical background documents based, for the most part, on geological information and interpretation. They have been designed as a component of the total land-use planning process and should be used in conjunction with other planning considerations, to ensure the best use of an area’s resources.

Keywords: Aggregate Resources:Sand and Gravel:Overburden:Bedrock Geology, General:Crushed Stones:Sediment:Surficial Geology, General:Glacial Deposits:Physiography:Stratification

Ontario Geological Survey Publication

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