| Title | Multibeam bathymetry and shaded seafloor relief, Lunenburg Bay, Scotian Shelf, offshore Nova Scotia |
| Download | Downloads |
| Author | King, E L; Beaver, D |
| Source | Geological Survey of Canada, Open File 8177, 2017, 1 sheet, https://doi.org/10.4095/299689 (Open Access) |
| Image |  |
| Year | 2017 |
| Publisher | Natural Resources Canada |
| Publisher | Canadian Hydrographic Service |
| Document | open file |
| Lang. | English |
| Maps | 1 map |
| Map Info. | geophysical, bathymetry and relief, 1:25,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 20T (NAD83) |
| Media | on-line; digital |
| Related | This publication is related to the following
publications |
| File format | pdf |
| Province | Eastern offshore region; Nova Scotia |
| NTS | 21A/08 |
| Area | Scotian Shelf; Lunenburg Bay; unenburg Harbour |
| Lat/Long WENS | -64.3333 -64.1250 44.3833 44.2583 |
| Subjects | geophysics; marine geology; surficial geology/geomorphology; bathymetry; seafloor topography; bedrock topography; bedforms; megaripples; sand waves; pockmarks; methane; submarine ridges; terraces;
marine sediments; muds; sands; gravels; boulders; glacial deposits; glaciomarine deposits; tills; till mounds; glacial features; drumlins; geophysical surveys; acoustic surveys, marine; sonar surveys; side-scan sonar; sediment dispersal; erosion;
bedrock geology; structural features; folds; faults; jointing; glacial history; postglacial evolution; sea level changes; dredging; biogenic gas; scour marks; multibeam bathymetry; mud moats; anthropogenic impacts; shipwrecks; Phanerozoic; Cenozoic;
Quaternary |
| Illustrations | location maps; index maps; photographs; geophysical images; cross-sections; geological sketch maps |
| Program | Public Safety Geoscience,
Marine Geohazards |
| Released | 2017 04 12 |
| Summary | (Plain Language Summary, not published)
This illustrated bathymetric (water depth) map, in shaded relief view, is one of a three-map series of Lunenburg Bay at a scale of 1:25 000. Water depth
is derived from 2004-06 sonar surveys and displayed as a beige and orange to blue colour spectrum. An insert map of the harbor shows natural and anthropogenic details including shallow gas escape, dredging and dredge spoils, and anchor marks.
Selected depth profile inserts help characterize across bedrock, sand dunes, and glacial and current-generated features. Another insert details the scuttling site of a military ship. The town and harbour have characteristic glacier-influenced
morphology while most of Lunenburg Bay follows the same bedrock morphological platforms, folds and minor faults as on adjacent land (slates and metamorphosed sandstones) but generally with better exposure than on land. Sediment distribution is
governed largely by glacial processes and their deposits (till and outwash sands and gravels), past lower sea-level and its subsequent rise which effectively erodes most sediment and drowned extensive salt marsh. |
| GEOSCAN ID | 299689 |
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