2.3.0 Geology and Soil Drainage

2.3.1 Background

       Burnaby Mountain is composed of layers of sandstone and conglomerates deposited in the Georgia Basin 39-45 million years ago. Glacial activity has produced slopes on the north side of the mountain to 60 degrees, causing slumpage. Presently the mountain is in a state of equilibrium, but slumping could resume with alteration of the current drainage patterns. The Mountain is underlain by layers of conglomerate, sandstone, siltstone and shale, with patches of poorly drained soils over top, forming perched water tables. See Plate Burnaby Mountain Community - surficial geology.

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