Purpose

To provide an overview of the bedrock geology of the Watershed.

Data source(s)

BC Ministry of Energy and Mines, Geological Survey Branch, 2002. Washington State Department of Natural Resources, 2005.

Explanation

The definitions for each type of rock are outlined below.

Intrusive Rock: Rock solidified from mass of magma that invaded earth’s crust but did not reach the surface.

Metamorphic Rock: Any rock changed in texture or composition by heat, pressure, or chemically active fluids after original formation, generally at depth in the earth’s crust.

Sedimentary Rock: Rock formed from accumulations of sediment, which may consist of rock fragments of various sizes, remains or products of animals or plants, products of chemical action or of evaporation, or mixtures of these.

Ultramafic Rock: Rock composed chiefly of mafic minerals, e.g., monomineralic rocks composed of hypersthene, augite, or olivine.

Volcanic Rock: Rock solidified from mass of magma poured or blown out upon earth's surface.

Disclaimer

The maps included in the Chilliwack River Watershed Atlas are not intended to be legal documents and it is important that users understand their limitations.  The data has come from many different sources collected at different times and therefore there are variations in the information provided.  In addition, the spatial accuracy of both resource and cadastral information will vary.  The maps are intended as a general guide that will need to be refined and updated.   Users are encouraged to contact the originator of the data in order to obtain up to date or more detailed mapping if required.  

Contacts

For more information about this project or the data in this map, please contact:

Lance Lilley	Shannon Sigurdson
Watershed Planner Fraser Valley Regional District Chilliwack, BC        llilley@fvrd.bc.ca	GIS Fraser Valley Regional District Chilliwack, BC ssigurdson@fvrd.bc.ca

 

View Basic Geology Map