The Duke Point-Kulleet Bay area is located on the southeast
coast of Vancouver Island, B.C., approximately 60 miles northwest
of Victoria, B.C. and 25 miles west, across the Strait of Georgia,
from Vancouver, B.C. Approximately 2500 feet of Late Cretaceous
sedimentary rocks of the Nanaimo Group are exposed within the area
The rocks were deposited in the Nanaimo Basin by a series of
east and northeast flowing streams and rivers carrying sediments
from the pre-Pennsylvanian Sicker Group volcanics, metavolcanics,
argillites and quartzites, the Late Triassic-Early Jurassic Vancouver
Group volcanics, limestones, argillites and greywackes, and the
Middle Jurassic granodiorite-gabbro Island Intrusions.
Formations within the area are: 1) the Cedar District, mainly
marine mudstones with limy concretions and sandstone dikes, and
Z) the De Courcy, mainly fluvial to shallow marine arkosic wackes,
exhibiting honeycomb weathering and containing concretions and
During the Late Cretaceous and Tertiary the rocks were
differentially uplifted and folded and faulted into a northwest-southeast
trending belt. The possibility of later episodes of
diastrophism, exists. Two Pleistocene glacial epochs scoured the
rocks and left till deposits behind during their retreats.
Coal was mined extensively in the Nanaimo Basin from the
1850's to the 1940's and 1950's, but is no longer an economic
commodity. Building stone and sand and gravel have been quarried
for local use. Petroleum companies have investigated the area, but
the results of their exploration have not been made public.
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