GSC, East Coast Basin Atlas Series - MIRAGE (Full list of available map sheets)

Labrador Sea Atlas - GEOSCAN (Cover Page) - MIRAGE (Cover Page)The Labrador Sea and Scotian Shelf volumes are published and are available as printed volumes and individual maps. Individual map sheets are also available.

Scotian Shelf Basin Atlas - GEOSCAN (Cover Page) - MIRAGE (Cover Page) The East Coast Basin Atlas Series is a current overview of the sedimentary basins of offshore Eastern Canada for a national and international user community. These data, provided by industry and government, include seismic reflection and refraction data as well as surficial, geotechnical, magnetic, gravity and well data. New seismic reflection and refraction data are integrated with aeromagnetic surveys and conventional seismic and well data.

Seismic Markers and Stratigraphic Picks in Scotian Basin Wells - GEOSCAN - MIRAGE Contents: lithostratigraphy on 139 wells in the Scotian Basin as well as the ties between these wells and some 300 000 kilometres of industry seismic data, seismic horizon and fault interpretation, synthetic seismic traces, biostratigraphic data on most wells, play type,significant hydrocarbon occurrences, 2-page format per well; 11" x 17" (28 cm x 43 cm), 276 pages

Circumpolar Geological Map of the Arctic - GEOSCAN - MIRAGE The Circumpolar Geological Map of the Arctic is a joint project of Theme 1, Geoscience and Arctic Petroleum, of the Programme of Scientific and Technical Cooperation between Canada and the U.S.S.R. in the Arctic and North. Information collected by Soviet and Canadian geoscientists and derived from international sources was compiled. The compilation summarizes available geological and geophysical data from the Arctic Ocean and adjacent continents and provides the basic information for understanding the geological evolution of the circumpolar region of the Arctic. The standards and format of the map and legend are a compromise among western European, Soviet, Canadian and American standards. The text is trilingual (English, French, Russian).

Circumpolar Map of Quaternary Deposits of the Arctic - GEOSCAN - MIRAGE The Circumpolar Map of Quaternary Deposits of the Arctic is a product of a joint project of Theme 1, Geoscience and Arctic Petroleum, of the Programme of Scientific and Technical Cooperation between Canada and the U.S.S.R. in the Arctic and North. As a compilation of Soviet, Canadian, and other unpublished and published terrestrial and marine Quaternary data, this map provides the basic information for understanding the Quaternary history of the Arctic Ocean basin and the surrounding oceans and land areas, as well as the nature of the surficial geological deposits. The text is trilingual (English, French, Russian).

Open File 1698 - Multibeam Bathymetry and Backscatter Data From St. George's Bay,Newfoundland Multibeam bathymetry and backscatter data were collected in St. George's Bay, Newfoundland, in 1995. This area was chosen because, unlike most of the Newfoundland inner shelf, it had been previously surveyed using conventional marine geological remote sensing tools (sidescan sonar, high- and low-resolution seismic reflection systems), and samples had been collected using a grab sampler and corer (Forbes and Shaw, 1989). The resulting data were interpreted by Shaw and Forbes (1990), and later integrated with data on the modern barriers that occur at the head of the bay (Shaw and Forbes, 1992). We selected St. George's Bay with the expectation that the new multibeam data could be easily interpreted, based on our existing understanding of the Quaternary geology and modern coastal processes.

Open File 2574 - Magnetic Anomalies and Tectonic Elements of Northeast Eurasia Derived from regional aeromagnetic maps, digital data sets for the territories of Russia, China and Mongolia have been assembled and merged to create a 1:10 000 000 map that offers an unprecedented portrayal of the magnetic field of the Eurasian continent between the Arctic coast and the southern border of China. Presented in colour shaded relief, the map highlights major tectonic features that are visibly imprinted in the magnetic field, such as cratons, crustal blocks, orogenic and fold belts, and suture and thrust zones. By offering a clear record of regional tectonism over nearly one quarter of the Earth's land area, this map provides a basis for studying the processes and the effects of major episodes of continental accretion and deformation.

Open File 2900 - Bathymetric and Topographic Shaded Relief North of 64°N This map of regional oceanic and continental morphology in the Arctic is a digital replication of Sheet 5.17 of the General Bathymetric Chart of the Oceans (GEBCO), which illustrates bathymetry in contour form for all oceanic areas in the polar region north of 64N (Canadian Hydrographic Service, 1979). The present map portrays depth and elevation information derived from two sources: the GEBCO Digital Atlas (Jones et al, 1994); and the ETOPO5 digital grid, which expresses global depths and elevations at intervals of 5 minutes of latitude and longitude (Loughridge, 1986).

Open File 3125 - Magnetic Anomalies of the Arctic and North Atlantic Oceans and Adjacent Land Areas (Also in this series, Open Files 3280, 3281, 3282) Begun in late 1988 at the GSC Atlantic, this project acquired and merged data sets from numerous organizations for the purpose of developing a digital database of coherent magnetic observations suitable for quantitative tectonic interpretations, and for the automated production of accurate maps. To promote widespread use of the new data base, four sets of products are being released to the geoscientific community;

Open File 3154 - The Bottom of Halifax Harbour See also MIRAGE This series of web pages represent a combination of multibeam bathymetric maps of Halifax Harbour produced by the Canadian Hydrographic Service and the Geological Survey of Canada (Atlantic) and a collage of map-referenced images of the seabed. It has been assembled from data collected during 7 years of marine geological mapping. Together, they tell a varied, complex and colorful history of Halifax Harbour and the surrounding communities of Halifax, Dartmouth, Bedford, Eastern Passage and Herring Cove.

Open File 3257 - Environmental Seabed Conditions of the Lunenburg Marine Park HMCS Saguenay is a decommissioned ISL class destroyer, DDH 206, (Helicopter Carrying Destroyer), which was sunk under controlled conditions, June 25, 1994, to establish a marine park in outer Lunenburg Bay. The South Shore Marine Park Society, a non profit community group, was the proponent responsible for establishment of the park. It is operated by Lunenburg Marine Park Inc. as a tourist destination for scuba divers. Several community related concerns were raised during the initial planning stages. The park operation was not to conflict with the lobster fishery. As a result it was decided that the park would only be open during the lobster offseason, which runs from the beginning of June to the end of November. Concerns were also raised regarding how the shipwreck would affect sediment dynamics and would the ship continue to sink into the seafloor.

Open File 3434 - Geology of Lake Winnipeg By the early 1990s, concerns regarding shoreline erosion and water quality in Lake Winnipeg drew attention to the urgent need for a better understanding of the natural history of this lake, in order to put recent changes into a long-term perspective. Scientists from the Geological Survey of Canada and Manitoba Energy and Mines proposed the first-ever regional geological study of the lake basin to help address these concerns by elucidating the postglacial (thousands of years) and geologically recent (hundreds of years) lake history. Regional geophysical transects, sediment coring and nearshore surveys were undertaken from the Canadian Coast Guard Ship Namao during 1994 and 1996. An aerial reconnaissance and classification of the shore zone was completed in 1994. The 1994 studies are reported by Todd et al. (1996).

Open File 3458 - Grand Banks Basin Atlas: Biostratigraphy and Maturation Data The Grand Banks of Newfoundland is the most prominent physiographic feature of the Atlantic margin of North America. The area of the Grand Banks and the Northeast Newfoundland Shelf from Laurentian Channel to southern Labrador, and including Flemish Cap, is about 450 000 km. This area contains an abundance of natural wealth which, in the past, has supported a strong traditional fishing industry. Most recently the Grand Banks have become a focal point for oil and natural gas exploration, and development of the giant Hibernia oil field has raised interest in the geological history, development and resource potential of the area.

Open File 3503 - Hurricane Hortense Strikes Atlantic Nova Scotia The physical impacts of Hurricane Hortense are illustrated for two adjacent coastal sites near Halifax: Story Head Beach, a low gravel barrier, and Miseners -Long Beach, a high gravel barrier

Open File 3653 - DINOFLAJ. Dinoflagellate Classification Database. A GSC on-line Open File. DINOFLAJ is a database system containing a current classification of fossil and living dinoflagellates down to generic rank, and an index of fossil dinoflagellates at generic, specific, and infraspecific ranks. Dinoflagellates are single-celled organisms that have two distinctive flagella during at least part of their life cycle and/or a special type of nucleus called a dinokaryon. They are probably best known as a principal cause of "red tides" and paralytic shellfish poisoning. A glossary and an extensive list of references for modern and fossil dinoflagellate taxonomic references are included, and all information is hyperlinked for convenient browsing.

Open File 3673 - Lithostratigraphic Correlation of the Upper Sydney Mines Formation in the Sydney Basin (Donkin to Point Aconi), Northeastern Nova Scotia In the Sydney Basin offshore Cape Breton Island, Nova Scotia (see Location Maps), eight major coal seams are recognized within Westphalian D and Stephanian strata of the Sydney Mines Formation (Boehner and Giles, 1986). All eight seams are penetrated by the wells shown on this cross-section. Summaries of the coal petrography, physicochemical properties, and facies associations are provided by Hacquebard (1998), while the regional geology is described by Gibling et al. (1987) among others. Stratigraphic ages have been determined through several studies of plant macrofossils and palynology (Bell, 1938; Barss and Hacquebard, 1967; Dolby, 1988; Dolby, 1989). Finally, the geographic area spanned by this cross-section is encompassed within the 1:50,000 scale geological map of Boehner and Giles (1986).

Open File 3730 - Surficial Geology and Geomorphology of Gabarus Bay and Louisbourg Harbour Swath bathymetry, high resolution seismic and cores taken off Louisbourg harbour, Cape Breton, illustrate the glacial history and coastal evolution of the region. The swath bathmetric data provides geomorphic evidence in the form of drumlins and crag and tail deposits which indicate landward ice flow from an ice dome centered on the eastern continental shelf off Nova Scotia. A dense grid of high resolution subbottom reflection profiles provide the stratigraphic data needed to define and map the relative age and origin of the outcropping materials. The seismic and swath data reveal former lake basins and drowned river systems which were cored to establish the depth and age of post glacial sea-levels. Cores intersecting a paleo lake in Louisbourg harbour and a drowned river seaward of Gabarus Bay, provide evidence for significant post glacial sea-level lowering to 82m . The detailed surficial geology map and digital terrain model reveal the morphology and composition of the seabed which provides a basis for understanding seafloor habitats.

Open File 3755 - Structure and Isopach Maps of the Jeanne d'Arc Basin, Grand Banks of Newfoundland Over the past 30 years, tens of thousands of kilometers of reflection seismic profiles have been acquired by the petroleum industry to assist in their exploration for hydrocarbons in the Jeanne d'Arc basin offshore eastern Canada. The Geological Survey of Canada undertook to systematically interpret these data, create regional maps of subsurface geology and provide a framework for increased understanding of the basin as assistance to further exploration and development. These maps are a subset (covering only the Jeanne d'Arc Basin) of the large scale maps that will be included in the Grand Banks Basin Atlas, one of series of Basin Atlases published by the Geological Survey of Canada (Atlantic). The original interpretation and mapping was performed by Tony Edwards in the late 1980's. The maps included in this open file were later digitized (from the manual contours) on a GIS and edited by Phil Moir.

Open File 3906 - SEAMAP Canada, as an international leader in ocean and aquatic mapping, is moving forward with a new initiative, the Seabed Resource Mapping Program (SeaMap). The initiative focus is sea and lakebed mapping of Canada's offshore, coastal and aquatic lands. Canada's leadership role has been demonstrated by our ability to develop cutting edge technology and apply these to address today's needs in industry and society. The applications have recently seen success and span a broad range, from telecommunications to offshore exploration; from national security to environmental assessment; and from fish habitat assessment to sustainable development. The available open file poster is an example of this work.

Open File 3921 - Frontier Geoscience Project (FGP) From 1984 to 1990, over 6800 kilometres of deep (> 15 s) multichannel reflection seismic data were collected offshore Eastern Canada as part of the GSC's Frontier Geoscience Project. Also referred to as "offshore Lithoprobe lines", the data, images and documentation are available here in various forms.

Open File 3930 - SEAMAP An exciting new application for multibeam bathymetric surveying is sea floor habitat mapping,in which a geological interpretation of bottom sediments is integrated with biological and oceanographic information. The present area of interest, Browns Bank on the southwestern Scotian Shelf (3), is extensively fished for sea scallops (4) and ground fish. The purpose of this cooperative work between the Geological Survey of Canada (Atlantic), the Canadian Hydrographic Service and the Department of Fisheries and Oceans is to produce sea floor maps of Browns Bank for fisheries habitat management, the commercial fishery, navigation charting, and geological assessment.

Open File 3995 - Habitat Mapping of the Gulf of Maine

Open File 4163 - Geological Survey of Canada's Atlantic Margin Subsurface Micropaleontology Studies - History, Facts and Figures Over 30 years of commercial hydrocarbon drilling exploration on the Canadian Atlantic Margin has provided the Geological Survey of Canada with a priceless collection of micropaleontological samples and data from the thick Jurassic-Quaternary sedimentary wedge underlying our continental margin. This material has allowed a small cadre of GSC scientists and technicians to document and correlate, using standardized methods of preparation and study, the micropaleontological assemblages found in the offshore wells. There has also developed a better understanding of the evolutionary history of individual microfossil taxa and whole benthic assemblages, as well as regional correlations with other microfossil groups. Such studies have helped unravel the tectonic and sedimentary history of the economically important hydrocarbon basins in the region. The state of micropaleontological knowledge of Canadian Atlantic Margin wells, including lists of wells sampled and studied is described, and a comprehensive listing of GSC-produced literature on the subject is provided.