Abstract The Nanaimo Group is an assemblage of conglomerate, sandstone, siltstone, shale, and minor coal deposited in the Nanaimo Basin during Santonian through Maestrichtian time (Muller and Jeletzky, 1970; Ward, 1978). It crops out on southeastern Vancouver Island, the Gulf Islands of British Columbia, and the San Juan Islands of Washington (Figs. 1, 2). Nearly continuous outcrops of the Namaimo Group occur along seacliffs on Vancouver Island, and on the Gulf and San Juan islands. Good exposures are also present along roadcuts and major rivers on Vancouver Island. Ferries from the mainland to Vancouver Island and most of the Gulf and San Juan islands can be boarded at Anacortes, Washington, and Tawassen, British Columbia, and taken to Sidney, British Columbia (approximately 20 mi, 32 km, north of Victoria on Vancouver Island), and to the San Juan and Gulf islands, respectively. Ferries can also be taken from Port Angeles, Washington, to Victoria, British Columbia. In addition, ferries run regularly between islands in both Canada and Washington. Current ferry schedules are necessary for travel in this area. Tidelands are considered public property in both Canada and the United States; access to the outcrops is available at many public beaches.

Abstract The Nanaimo Group is an assemblage of conglomerate, sandstone, siltstone, shale, and minor coal deposited in the Nanaimo Basin during Santonian through Maestrichtian time (Muller and Jeletzky, 1970; Ward, 1978). It crops out on southeastern Vancouver Island, the Gulf Islands of British Columbia, and the San Juan Islands of Washington (Figs. 1, 2). Nearly continuous outcrops of the Namaimo Group occur along seacliffs on Vancouver Island, and on the Gulf and San Juan islands. Good exposures are also present along roadcuts and major rivers on Vancouver Island. Ferries from the mainland to Vancouver Island and most of the Gulf and San Juan islands can be boarded at Anacortes, Washington, and Tawassen, British Columbia, and taken to Sidney, British Columbia (approximately 20 mi, 32 km, north of Victoria on Vancouver Island), and to the San Juan and Gulf islands, respectively. Ferries can also be taken from Port Angeles, Washington, to Victoria, British Columbia. In addition, ferries run regularly between islands in both Canada and Washington. Current ferry schedules are necessary for travel in this area. Tidelands are considered public property in both Canada and the United States; access to the outcrops is available at many public beaches.

Abstract Sampling glacially transported boulders is effective for mapping Subcrop clay alteration patterns associated with deeply-buried unconformity-type uranium deposits in the Athabasca Basin of northern Saskatchewan, Canada. The technique works well because the subcrop alteration haloes show significant geochemical contrast with background, because the glacial deposits are consistently distributed and rich in boulders, and the altered boulders are typically well-represented in the boulder population. Boulder sampling is preferred over some other techniques because it is rapid and inexpensive, and the use of a lithological sampling medium provides a direct measure of subcrop clay-mineralogy, in an area where outcrop exposure is very restricted. A large composite boulder sample data set, comprising c. 20000 samples from within the eastern part of the Athabasca Basin, has been compiled. Sampling and analytical techniques are described, and results are presented at both regional and semi-regional scales. The distributions show clear correlations with both basin-scale features, such as stratigraphical variation and regional alteration patterns, and with deposit-related features, such as hydrothermal illite, dravite and chlorite alteration. Composite boulder lithogeochemistry may be equally effective for mineral exploration in other glaciated regions with restricted bedrock exposure.

Abstract Sucia Island, part of the San Juan archipelago of western Washington, is underlain by sedimentary rocks of the Upper Cretaceous Nanaimo Group and Eocene Chucka-nut Formation (molasse). The Chuckanut overlies the Nanaimo along an important thrust fault. In addition to the geology, this trip is designed to provide excellent views of many species of sea and land birds that inhabit the offshore waters.