| Title | Surficial geology, Halifax Harbour, Nova Scotia |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Fader, G B J; Miller, R O |
| Source | Geological Survey of Canada, Bulletin no. 590, 2008, 176 pages; 1 CD-ROM, https://doi.org/10.4095/224797  Open Access |
| Links | Erratum
|
| Image |  |
| Image |  |
| Image |  |
| Image |  |
| Image |  |
| Image |  |
| Image |  |
| Year | 2008 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | Publication contains 7 maps |
| Map Info. | geophysical, sun-illuminated seabed morphology, 1:25,000 |
| Map Info. | geophysical, sun-illuminated seabed morphology, 1:50,000 |
| Map Info. | geophysical, sun-illuminated seabed slope, 1:25,000 |
| Map Info. | geological, interpreted seabed morphology, 1:25,000 |
| Map Info. | surficial geology, glacial deposits and landforms, 1:25,000 |
| Map Info. | geological, interpreted seabed morphology, 1:8,333 |
| Media | paper; CD-ROM; digital; on-line |
| Related | This publication contains the following
publications |
| File format | pdf (Adobe® Reader® v. 6.0 is included / est fourni); JPEG2000; txt |
| Province | Eastern offshore region; Nova Scotia |
| NTS | 11D/11SW; 11D/12SE; 11D/12NE |
| Area | Halifax Harbour; Halifax; Bedford Bay; Inner harbour; Outer harbour |
| Lat/Long WENS | -63.6833 -63.4333 44.7333 44.5000 |
| Subjects | surficial geology/geomorphology; geophysics; marine geology; geochemistry; physiography; seismic reflection surveys; seismic surveys; geophysical surveys; bathymetry; side-scan sonar; bedrock geology;
glacial deposits; glacial features; glacial landforms; glacial history; oceanography; lithology; tills; sands; gravels; lacustrine deposits; estuarine deposits; depositional history; depositional environment; sediment transport; erosion; bedforms;
Bedford Basin; LaHave Clay; Wisconsinan Glaciation; Hurricane Juan; Cenozoic; Quaternary |
| Illustrations | sketch maps; profiles; tables; stratigraphic sections; photographs |
| Program | Geoscience
for Oceans Management |
| Released | 2008 06 01; 2008 06 02; 2010 06 02 |
| Abstract | The marine geology of Halifax Harbour, Nova Scotia, was studied using seismic-reflection profiles, sidescan-sonar systems, multibeam bathymetry, seabed samples, cores, and photographic observations.
Dating of core material and information from seabed samples were correlated with the stratigraphic information from the seismic-reflection data and multibeam backscatter. Maps of detailed multibeam
bathymetry, seabed slope, sediment distributions,
and both natural and anthropogenic seabed features and processes are presented.
The surficial geology of Halifax Harbour results from glacial erosion and deposition during ice advance and retreat across a former fluvial drainage system,
subsequent glaciomarine and lacustrine deposition, erosion by a marine transgression, and recent sedimentation. The outer harbour largely consists of coarse, well sorted sand and gravel with bedrock outcrop in many areas. Sand ribbons,
megaripples,
and gravel circles form in response to currents and waves. In contrast, the inner harbour consists of gas-charged Holocene mud and is covered with anchor marks, dredge spoils, shipwrecks, cables, and other debris. Natural features
include sedimentary furrows, drumlins, moraines, pockmarks, and former shorelines. The inner harbour largely traps sediments and their associated contaminants and minimal amounts are transported out of the harbour.
Halifax Harbour is one of
the first marine areas in Canada to have been studied with multibeam bathymetry. It provides a high-resolution portrayal of seabed morphology and features that are interpreted from a morphodynamic perspective. Net sediment transport is dominantly
from south to north. The seabed sediment mapping and assessment of anthropogenic features provides a basis for management of Halifax Harbour including marine habitats. |
| GEOSCAN ID | 224797 |
|
|