Bedrock Geology of Ontario

The Precambrian Geoscience Section, Ontario Geological Survey, has compiled a 1:250 000 scale map of the bedrock geology of Ontario. The map has recently been revised and updated and replaces the map previously released on MRD 126. This new version also includes a complete update and revision of the bedrock geology for the Abitibi greenstone belt. This seamless GIS data set includes such themes as bedrock units, major faults, dike swarms, iron formations and kimberlites.

Coordinate system: UTM - NAD 83 and NAD 27.
Source format: ESRI Shapefiles (ArcGIS/ArcView)
Released: 2006
Library Call Number: GD.CA.21 (Ontario)

Please note that the Map and Data Centre also holds a large collection of very detailed paper maps for Ontario Bedrock and Surficial Geology. Please see the Maps & Atlases page for more details.

Restrictions on Access

This resource is available to University of Western Ontario students, faculty and staff for academic, research or personal reasons.  Patrons will be required to present a valid UWO ID card and sign a release form when requesting the data. Data must be requested in person at the Map and Data Centre Reference desk.

Data Manipulation / Usage

The Map and Data Centre has 2 GIS workstations equipped with ArcGIS 10.0 and other software to explore/manipulate the data.  UWO users may also copy requested resources to a data storage device (ex. USB flash drive, CD-R) for research or teaching use outside of the library. The Ontario Geological Survey should be cited in any maps or graphics generated.

Sample View of the Data

Bedrock Geology in the Temagami Lake area, Ontario

Sample Citation

1:250 000 scale bedrock geology of Ontario; Miscellaneous Release—Data 126 – Revised. [computer file]. Sudbury: Ontario Geological Survey, 2006.