* Glacial Till: This is the most common type of rock found in Surrey. Glacial till is a mixture of unsorted sediment, including clay, silt, sand, gravel, and boulders, deposited by glaciers during the last ice age. It forms the base of much of the Fraser Lowland and often underlies the soils.
* Alluvium: This refers to sediment deposited by rivers. In Surrey, the Fraser River is the primary source of alluvium, which is found along the river banks and floodplains. It consists of a variety of sediments, including sand, gravel, and silt.
* Bedrock: While bedrock is largely covered by glacial deposits and alluvium in Surrey, there are some areas where it outcrops. The bedrock in this region is primarily sedimentary rock, including sandstone, siltstone, and mudstone from the Fraser River Group. These rocks were deposited in a marine environment millions of years ago.
Other Notable Rock Types:
* Volcanic Rocks: While not as common as the other rock types, volcanic rocks can be found in some areas of Surrey. This is due to past volcanic activity in the region, leaving behind remnants like basalt and andesite.
It's important to note that the distribution and specific types of rock can vary significantly within Surrey, depending on the location and geological history of the area.
To learn more about specific locations and rock formations in Surrey, you can consult resources like:
* British Columbia Geological Survey: https://www.empr.gov.bc.ca/mining-and-exploration/geoscience-and-data/
* Surrey Museum: https://surreymuseum.ca/
These resources provide geological maps and information on the specific rock types and formations found within Surrey, giving you a deeper understanding of the local geology.
