FIGURES
Figure 1. In bedrock mapping, map-unit designations are based on a hierarchical system. The figure illustrates the systems for volcanic and sedimentary rocks, and for plutonic and metamorphic rocks.
Figure 2. Stages in a bedrock mapping program from inception to final map and report production
Figure 3. Examples of computer-oriented data collection forms (these are the 2field forms used for data capture by the British Columbia Geological Survey Branch.
Figure 4. Index maps showing the grids used for National Topographic System (NTS) and British Columbia Geographic System (BCGS) maps.
Figure 5. An example of the structure of the title block recommended for use on bedrock maps (that used by the B.C. Geological Survey Branch; from Grant and Newell, 1992).
Figure 6. Example of a project area “Location Index Map” to accompany a bedrock geological map.
Figure 7. Data reliability index maps for a bedrock map are provided by two inset maps. (a). The ‘source map’ displays the sources of information used to produce the main geologic map, and (b) The ‘traverse map’ shows all traverse lines (including roads mapped) and individual spot checks made during the field survey.
Figure 8. Reproduced portions of a bedrock map legend shows layout and formatting of a typical geological legend. Legend example taken from Schiarizza and Gaba (1996). See Figure 11 for explanation of symbols used.
Figure 9. The 1992 geologic time scale; updated from Figure 3. Typical topographic map systems used in British Columbia are the National Topographic System (NTS), used for most 1:50 000 scale maps, and the British Columbia Geographic System (BCGS), used for 1:20 000 scale Terrain Resource Inventory Maps (TRIM). The figure shows how the two systems are organised.
Figure 10. Symbols commonly found on geology maps (modified after Grant and Newell, 1990)
Figure 11: Symbols and usage to describe ages of geological units in reports and on maps (after Grant and Newell, 1990)
ACKNOWLEDGMENTS
Funding of the Resources Inventory Committee work, including the preparation of this document, is provided by the Corporate Resource Inventory Initiative (CRII) and by Forest Renewal BC (FRBC). Preliminary work of the Resources Inventory Committee was funded by the Canada-British Columbia Partnership Agreement of Forest Resource Development FRDA II.
The Resources Inventory Committee consists of representatives from various ministries and agencies of the Canadian and the British Columbia governments as well as from First Nations peoples. RIC objectives are to develop a common set of standards and procedures for the provincial resources inventories, as recommended by the Forest Resources Commission in its report “The Future of our Forests”.
For further information about the Resources Inventory Committee and its various Task Forces, please contact:
Resources Inventory Committee
840 Cormorant Street
Victoria, BC V8W 1R1
Tel: (250) 920-0661
Fax: (250) 384-1841
http://srmwww.gov.bc.ca/risc
Earth Sciences Series
HTML Created: July 97
Copyright © 1997 Province of British Columbia
Published by the Resources Inventory Committee
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