| Title | Deglacial dynamics of the Foxe-Baffin Ice Sheet, Frobisher Bay, Nunavut, Canada revealed by submarine landform mapping |
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| Author | Todd, B J ;
Dowdeswell, J A; Shaw, J; Campbell, D C; Mate, D J |
| Source | Journal of Quaternary Science 2022 p. 1-21, https://doi.org/10.1002/jqs.3486 |
| Image |  |
| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20210625 |
| Publisher | Wiley-Blackwell |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Nunavut |
| NTS | 25I/09; 25I/10; 25I/11; 25I/12; 25I/13; 25I/14; 25I/15; 25I/16; 25J/09; 25J/10; 25J/11; 25J/12; 25J/13; 25J/14; 25J/15; 25J/16; 25K/09; 25K/10; 25K/15; 25K/16; 25N/01; 25N/02; 25N/07; 25N/08; 25N/09; 25N/10;
25O; 25P |
| Area | Frobisher Bay |
| Lat/Long WENS | -69.0000 -64.0000 63.7500 62.5000 |
| Subjects | surficial geology/geomorphology; ice; ice morphology; bedrock geology; bedrock topography; submarine features; glacial landforms; Foxe Ice Dome; Quaternary |
| Illustrations | location maps; tables; bathymetric profiles |
| Program | Marine Geoscience for Marine Spatial Planning |
| Released | 2022 12 14 |
| Abstract | Previous interpretation of the nature and distribution of subaerial glacial landforms established that Frobisher Bay in southeastern Baffin Island was glaciated in the Late Wisconsinan by ice flowing
southeast from the Foxe-Baffin Ice Dome. New seafloor mapping within the bay has revealed submarine glacial landforms that are described and interpreted in the context of their subglacial, ice - marginal, glaciomarine and marine process environments.
Interpretation of the evidence confirms that ice occupied Frobisher Bay, flowing from the northwest to southeast, parallel to the orientation of the bay. Relatively rapid ice velocities are indicated by the presence of icemoulded bedrock and
megaridges flanking a deep trough (>700 m) along the faulted southern flank of Frobisher Bay. In shallower regions, areal scouring and channelisation indicate the widespread presence of glacial ice. As ice retreated to the northwest towards the Foxe
Ice Dome, De Geer and recessional moraines were deposited at the ice front. The latter correlate spatially with the extensive Frobisher Bay Moraine System on land. Two iceberg ploughmark populations are evident, with smaller relict features in
shallow water in rare locations in the northwest of the bay, and larger relict and modern ploughmarks in deeper water in outer Frobisher Bay. |
| Summary | (Plain Language Summary, not published)
Previous interpretation established that Frobisher Bay in southeastern Baffin Island was glaciated in the Late Wisconsinan by ice flowing southeast from
the Foxe-Baffin Ice Dome. New sea floor mapping within the bay has revealed submarine glacial landforms. The evidence confirms that ice occupied Frobisher Bay, flowing from northwest to southeast, parallel to the orientation of the bay. Rapid ice
velocities are indicated. |
| GEOSCAN ID | 329576 |
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