Graduate Thesis Or Dissertation
 

Geology of the Duke Point-Kulleet Bay area, Vancouver Island, B.C.

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  • 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 of investigation. 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 minor conglomerate, 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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  • File scanned at 300 ppi (Monochrome, 24-bit Color) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.Plates: Master map file scanned at 600 dpi, 24-bit color on a Paradigm ImagePRO GxT 42 HD (OEM version of ColortracSmartLF Bx 42). Image manipulated by SmartLF1.3.05.
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